Explore skincare ingredients — learn what they do, how to use them, and what to watch out for.
A potent tyrosinase and TRP-1 inhibitor for treating hyperpigmentation. One of the most effective non-hydroquinone brightening agents.
A neurotransmitter-inhibiting peptide that reduces the intensity of facial muscle contractions, often called "topical Botox" in marketing.
A synthetic polymer used as a thickener, film former, and emulsion stabilizer. Creates smooth gel textures.
A third-generation synthetic retinoid available OTC (0.1%) and by prescription. More stable and less irritating than tretinoin while maintaining efficacy for acne.
A naturally occurring nucleoside used in Korean skincare for its anti-wrinkle and wound-healing properties. Approved as an anti-wrinkle functional ingredient by KFDA.
A gentle compound found in comfrey plant, wheat sprouts, and chamomile. Known for its soothing, moisturizing, and skin-healing properties.
Gel extracted from the succulent Aloe barbadensis plant. Contains over 75 active compounds including vitamins, minerals, enzymes, and amino acids.
A naturally derived skin brightening agent that inhibits tyrosinase to reduce melanin production. Gentler alternative to hydroquinone.
The building blocks of proteins and a major component of skin's Natural Moisturizing Factor (NMF). Multiple amino acids work together to maintain skin hydration and health.
Apple cider vinegar (ACV) is produced through the two-stage fermentation of apple juice, first converting sugars to ethanol via yeast fermentation, then oxidizing the ethanol to acetic acid by Acetobacter bacteria. The resulting product typically contains 4% to 8% acetic acid along with malic acid, citric acid, lactic acid, and a variety of polyphenols derived from the apple source material. Unfiltered versions contain the "mother," a colony of acetic acid bacteria and cellulose that provides additional bioactive compounds. In skincare, ACV functions primarily as an acidic exfoliant and pH-adjusting agent. The low pH of approximately 2.5 to 3.5 can help restore the acid mantle of the skin, which is disrupted in conditions such as acne, eczema, and dermatitis. Acetic acid also demonstrates antimicrobial activity against a range of pathogens including Staphylococcus aureus, Pseudomonas aeruginosa, and Candida species.
The most common ingredient in skincare products, typically listed first. Serves as the base solvent for water-based formulations.
A naturally derived hydroquinone glycoside found in bearberry, cranberry, and blueberry plants. A gentler alternative to hydroquinone for skin brightening.
Argan oil is a precious, slow-growing oil extracted from the kernels of the Argania spinosa tree, which is endemic to the semi-desert Sous valley of southwestern Morocco. The oil is produced through a labor-intensive process of cracking, roasting (for culinary use) or cold-pressing (for cosmetic use), and hand-extraction, making it one of the rarest and most expensive oils in the world. Cosmetic-grade argan oil is unroasted and retains its full complement of bioactive compounds. Its fatty acid profile consists of approximately 43-49% oleic acid and 29-36% linoleic acid, creating a balanced blend of omega-9 and omega-6 fatty acids. Argan oil is exceptionally rich in tocopherols (vitamin E), containing 600-900 mg/kg, along with squalene, sterols (schottenol and spinasterol), polyphenols (ferulic acid and vanillic acid), and triterpene alcohols. These compounds collectively contribute to its outstanding emollient, anti-aging, and antioxidant properties.
Arnica is a botanical extract obtained from the flowering heads of Arnica montana, a perennial plant native to the mountainous regions of Europe and Siberia. The primary bioactive constituents are sesquiterpene lactones, particularly helenalin and its derivatives, which are responsible for the potent anti-inflammatory and analgesic effects. Arnica also contains flavonoids, essential oils, thymol, and polysaccharides that contribute to its therapeutic profile. In topical skincare, arnica is widely used to reduce bruising, swelling, and inflammation associated with trauma, post-surgical recovery, and chronic inflammatory skin conditions. Helenalin works by inhibiting the transcription factor NF-kB, a master regulator of inflammatory gene expression, thereby decreasing the production of cytokines, chemokines, and adhesion molecules involved in the inflammatory cascade.
An oil-soluble Vitamin C derivative with superior stability and skin penetration compared to L-Ascorbic Acid.
A carotenoid pigment found in microalgae and salmon. Considered one of the most powerful natural antioxidants, significantly stronger than Vitamin E.
A chemical UV filter that provides excellent UVA protection. The most widely used UVA filter in the US market.
Avocado oil is a rich, nourishing oil obtained from the pulp of the Persea americana fruit, one of the few oils derived from the fleshy fruit rather than the seed. Unrefined avocado oil has a deep emerald green color due to its high chlorophyll content and contains an exceptionally broad spectrum of nutrients. Its fatty acid composition is dominated by oleic acid (approximately 50-70%), with palmitic acid (10-20%), linoleic acid (6-15%), palmitoleic acid (2-9%), and alpha-linolenic acid (approximately 1%). The oil is uniquely rich in the unsaponifiable fraction, comprising 2-11% of the total oil, which includes phytosterols (beta-sitosterol, campesterol, stigmasterol), fat-soluble vitamins (A, D, E, K), polyhydroxylated fatty alcohols, and carotenoids (lutein and zeaxanthin). These unsaponifiable components are largely responsible for its reputation as a penetrating, deeply nourishing oil that reaches the dermis rather than merely sitting on the skin surface.
A naturally occurring dicarboxylic acid with antibacterial, anti-inflammatory, and antioxidant properties. Effective for acne, rosacea, and hyperpigmentation.
A water-soluble derivative of azelaic acid complexed with glycine. Provides azelaic acid benefits with better solubility and tolerability.
A blue-colored aromatic compound found in chamomile and other plants. Known for its potent anti-inflammatory and soothing properties.
A plant-derived compound from the Psoralea corylifolia plant that offers retinol-like benefits without the irritation. Suitable for sensitive skin and pregnancy.
An extract from bamboo rich in silica, amino acids, and flavonoids. Used for hydration and as a natural source of silica.
Bearberry extract is obtained from the leaves of Arctostaphylos uva-ursi, a low-growing evergreen shrub in the Ericaceae family found across circumboreal regions of North America, Europe, and Asia. The primary active compound for dermatological use is arbutin, a naturally occurring beta-D-glucopyranoside of hydroquinone. Arbutin inhibits tyrosinase activity by competitively binding to the enzyme active site without causing the cytotoxic effects associated with free hydroquinone. The extract also contains methylarbutin, gallic acid, ursolic acid, and tannins that contribute additional antioxidant, astringent, and anti-inflammatory properties. Alpha-arbutin, the synthetic epimer commonly used in skincare, is structurally related but has approximately ten times greater tyrosinase inhibitory activity than the naturally occurring beta-arbutin found in bearberry. Bearberry extract offers a gentler approach to addressing hyperpigmentation compared to hydroquinone, making it suitable for long-term use in skin-brightening regimens.
A natural wax produced by honeybees. Acts as an occlusive barrier and thickening agent with mild antibacterial properties.
A natural volcanic ash clay with strong absorptive properties. Draws out impurities, excess oil, and toxins from the skin when used as a mask.
A naturally occurring aromatic acid found in berries. Used as a preservative and pH adjuster in cosmetics.
An antibacterial agent that kills acne-causing bacteria (C. acnes) and helps unclog pores. One of the most effective OTC acne treatments available.
A polysaccharide found in oats, mushrooms, and yeast. Provides deep hydration, soothing, and immune-boosting benefits for skin.
A naturally occurring osmolyte found in sugar beets. Functions as a humectant and osmoprotectant that helps cells retain water.
A synthetic antioxidant used to prevent oxidation and rancidity in cosmetic products containing oils and fats.
A lysate from Bifidobacterium fermentation. Protects skin from environmental stress and supports natural repair mechanisms.
A lightweight humectant and solvent commonly used in skincare. Helps other ingredients penetrate the skin and adds hydration.
A stimulant compound commonly used in eye creams and body products for its ability to constrict blood vessels, reduce puffiness, and provide antioxidant protection.
Calendula extract is obtained from the flowers of Calendula officinalis, commonly known as pot marigold, a member of the Asteraceae family. The extract is rich in triterpenoids (particularly faradiol and its esters), flavonoids (quercetin, isorhamnetin, rutin), carotenoids, and polysaccharides. These compounds collectively contribute to its well-documented anti-inflammatory, antimicrobial, and wound-healing properties. Faradiol esters have been shown to inhibit lipoxygenase and reduce croton oil-induced ear edema in animal models. Calendula promotes wound healing through multiple mechanisms: stimulating angiogenesis, increasing fibronectin and collagen synthesis, and enhancing granulation tissue formation. In skincare, calendula extract is prized for its gentle yet effective soothing action, making it a staple in formulations for sensitive, irritated, and compromised skin.
A non-psychoactive cannabinoid derived from hemp. Shows promise for anti-inflammatory, sebum-regulating, and antioxidant skin benefits.
A lightweight emollient derived from coconut or palm kernel oil. Provides a silky, non-greasy feel similar to silicones.
A synthetic polymer used to thicken, stabilize, and create gel textures in skincare products. One of the most common thickening agents.
A herbaceous plant used for centuries in traditional medicine. Rich in active compounds (madecassoside, asiaticoside) that calm inflammation and promote wound healing.
Purified triterpene compounds from Centella Asiatica. Madecassoside and asiaticoside are the key active compounds responsible for its skin benefits.
Lipids naturally found in the skin barrier that make up about 50% of the skin's composition. Essential for maintaining moisture and protecting against environmental damage.
A non-ionic emulsifier that helps oil and water phases mix in cosmetic formulations. Creates stable creams and lotions.
A fatty alcohol (not a drying alcohol) that acts as an emollient and emulsion stabilizer. Derived from natural fats.
A fatty alcohol derived from palm or coconut oil. Acts as an emollient, emulsifier, and thickener in cosmetic formulations.
Chamomile extract is derived from the flowers of Matricaria chamomilla (German chamomile) or Chamaemelum nobile (Roman chamomile), both members of the Asteraceae family. The extract contains a complex mixture of bioactive compounds including alpha-bisabolol, chamazulene, apigenin, and matricin. Alpha-bisabolol is the primary anti-inflammatory agent, while apigenin acts as a potent flavonoid antioxidant that binds to benzodiazepine receptors, contributing to the calming properties associated with chamomile. In dermatology, chamomile extract has a long history of use for managing eczema, contact dermatitis, and post-procedural erythema. It inhibits cyclooxygenase and lipoxygenase pathways, reducing prostaglandin and leukotriene synthesis, which makes it effective at diminishing redness, swelling, and irritation at the cellular level.
Chia seed oil is a nutrient-dense plant oil cold-pressed from the seeds of Salvia hispanica, an herbaceous plant native to Central America with a rich history in Aztec and Mayan medicine. It is one of the most concentrated plant sources of alpha-linolenic acid (ALA), an omega-3 fatty acid that comprises approximately 55-65% of the oil, making it even richer in omega-3s than flaxseed oil. The remaining fatty acid profile includes approximately 17-21% linoleic acid (omega-6), 6-9% oleic acid, and small amounts of palmitic and stearic acids. The extraordinarily high omega-3 content gives chia seed oil potent anti-inflammatory properties and makes it particularly effective for calming reactive, sensitized, and chronically inflamed skin. The oil also contains natural antioxidants including myricetin, quercetin, kaempferol, chlorogenic acid, and caffeic acid, which contribute to its remarkable oxidative stability despite the high polyunsaturated fat content.
A synthetic preservative effective against bacteria and fungi. Often used in combination with other preservatives.
Cholesterol is a skin-identical lipid that occurs naturally in the stratum corneum, where it constitutes approximately 25% of the intercellular lipid matrix alongside ceramides and free fatty acids. It plays a critical structural role in organizing lamellar bilayers, the lipid sheets between corneocytes that regulate transepidermal water loss (TEWL) and protect against environmental insults. When applied topically, cholesterol integrates into the existing lipid architecture, restoring barrier integrity compromised by surfactant exposure, environmental damage, or aging-related lipid depletion. Unlike occlusive agents that merely sit on the skin surface, cholesterol actively participates in barrier repair by facilitating proper lipid packing and phase behavior within the intercellular domains.
A naturally occurring alpha hydroxy acid found in citrus fruits. Used primarily as a pH adjuster in skincare, with mild exfoliating properties at lower pH.
A topical antibiotic commonly prescribed for acne. Works by inhibiting bacterial protein synthesis to reduce acne-causing bacteria on the skin.
A mild amphoteric surfactant derived from coconut oil. Often used to reduce the irritation potential of stronger surfactants.
A very gentle non-ionic surfactant derived from coconut and glucose. One of the mildest cleansing agents available.
Cocoa butter is a pale yellow, solid fat extracted from the roasted seeds (beans) of the Theobroma cacao tree, the same plant that produces chocolate. It has been used for centuries in Central and South American traditional medicine for its skin-healing properties. Cocoa butter is unique among plant fats for its remarkable crystalline stability and sharp melting point (34-38 degrees Celsius), which causes it to transition from a firm solid to a smooth liquid at just below body temperature, producing a characteristic cooling sensation upon application. Its fatty acid composition is highly saturated, consisting primarily of stearic acid (33-37%), oleic acid (30-37%), and palmitic acid (24-28%), with only trace amounts of linoleic acid (2-4%). The high saturated fat content gives cocoa butter exceptional oxidative stability and a shelf life that can exceed 3-5 years. It also contains cocoa mass polyphenols (CMPs) including epicatechin, catechin, and procyanidins, which are potent antioxidants, along with theobromine and caffeine.
Coconut oil is extracted from the meat (kernel) of mature coconuts harvested from the Cocos nucifera palm. It is one of the most widely used plant oils in cosmetics and personal care worldwide. Virgin coconut oil (VCO) is obtained through cold-pressing or wet-milling of fresh coconut meat, preserving its full complement of bioactive compounds. Coconut oil is distinctive among plant oils for its exceptionally high saturated fat content (approximately 82-92%), of which roughly 45-52% is lauric acid, a medium-chain fatty acid with well-documented antimicrobial properties. Other fatty acids include myristic acid (16-21%), caprylic acid (5-10%), capric acid (4-8%), palmitic acid (7-10%), and oleic acid (5-8%). The oil is solid below approximately 24 degrees Celsius and melts to a clear liquid above this temperature. VCO also contains phenolic compounds, tocopherols, phytosterols, and monoglycerides, particularly monolaurin, which is formed when lauric acid is metabolized and is one of the most potent natural antimicrobial agents known.
A naturally occurring antioxidant in the body that decreases with age. Helps energize skin cells and protect against oxidative damage.
Coenzyme Q10, also known as ubiquinone, is a naturally occurring fat-soluble antioxidant found in nearly every cell of the human body, where it plays a critical role in mitochondrial energy production. In the skin, CoQ10 levels decline significantly with age and ultraviolet exposure, contributing to reduced cellular energy, diminished repair capacity, and increased oxidative damage. Topically applied CoQ10 penetrates the viable layers of the epidermis, where it helps neutralize free radicals, support the electron transport chain in keratinocytes, and reduce the depth of wrinkles by preserving collagen and elastin integrity. Its lipophilic nature allows it to integrate into cell membranes, reinforcing their structural stability against peroxidative damage.
A structural protein that provides skin with firmness and elasticity. Topical collagen acts primarily as a humectant due to its large molecular size.
Finely ground oatmeal recognized by the FDA as a skin protectant. Contains beta-glucans, avenanthramides, and other compounds that soothe and protect skin.
A naturally occurring copper complex of the tripeptide GHK. One of the most extensively studied peptides for wound healing and anti-aging.
Copper peptides, most commonly represented by the tripeptide-copper complex GHK-Cu, are small protein fragments bound to copper ions that occur naturally in human plasma, saliva, and urine. GHK-Cu plays a fundamental role in tissue remodeling by stimulating the synthesis of collagen, elastin, glycosaminoglycans, and other components of the extracellular matrix. In dermatology, copper peptides have attracted significant attention for their dual capacity to promote wound healing while simultaneously reducing the appearance of aging skin. The copper ion serves as a cofactor for lysyl oxidase, the enzyme responsible for cross-linking collagen and elastin fibers, while the GHK peptide sequence itself modulates gene expression related to tissue repair and anti-inflammatory pathways.
A lightweight volatile silicone that evaporates after application, leaving a smooth, silky finish without residue.
A naturally occurring aminothiol with potent depigmenting activity. Works through multiple mechanisms to reduce melanin production.
Simple alcohols used as solvents to help products dry quickly and enhance penetration. Can be drying and irritating.
A silicone-based polymer that creates a breathable, protective barrier on the skin surface. One of the most common ingredients in skincare and cosmetics.
A cross-linked silicone elastomer that provides a unique silky, powdery finish. Used in primers and mattifying products.
A chelating agent that binds metal ions to improve product stability and enhance preservative effectiveness.
An extremolyte produced by bacteria in extreme environments. Protects cells from stress including UV, pollution, and dehydration.
A structural protein responsible for skin elasticity. Like collagen, topical elastin primarily functions as a humectant.
A growth factor protein that stimulates cell growth, proliferation, and differentiation. Used in anti-aging skincare for skin renewal.
Ethyl ascorbic acid (3-O-ethyl ascorbic acid) is an ethylated derivative of L-ascorbic acid that represents one of the more recent advances in stable vitamin C technology for skincare. The ethyl group at the C-3 position protects the molecule from oxidative degradation while preserving direct antioxidant activity without requiring enzymatic conversion, unlike most other vitamin C derivatives. This means ethyl ascorbic acid can function as both a stable storage form and a directly active antioxidant simultaneously. It is water-soluble and effective at a neutral pH around 7, making it comfortable for all skin types including sensitive skin. Studies have shown that ethyl ascorbic acid inhibits tyrosinase, stimulates collagen production, and scavenges free radicals with an efficacy profile that bridges the gap between the potency of pure L-ascorbic acid and the stability of phosphorylated derivatives.
A mild preservative booster and skin-conditioning agent derived from glycerin. Often paired with phenoxyethanol.
Eucalyptus oil is a potent essential oil steam-distilled from the leaves of Eucalyptus globulus and related species. Its primary bioactive compound is 1,8-cineole (eucalyptol), which typically constitutes 60-85% of the oil and is responsible for its characteristic camphoraceous, cooling aroma and most of its therapeutic properties. Other significant constituents include alpha-pinene, limonene, alpha-terpineol, and aromadendrene. Eucalyptus oil has been used medicinally for over a century and is well-documented for its broad-spectrum antimicrobial, anti-inflammatory, and analgesic activities. In skincare, it serves as a powerful antiseptic that can help manage acne-causing bacteria, fungal infections, and minor wound infections. It also functions as a natural penetration enhancer, facilitating the absorption of other active ingredients through the skin. Due to its high potency, it must always be properly diluted before topical application.
Evening primrose oil is extracted from the seeds of Oenothera biennis, a wildflower native to North America that blooms in the evening hours. It is one of the richest botanical sources of gamma-linolenic acid (GLA), a conditionally essential omega-6 fatty acid that typically constitutes 7-14% of the oil, alongside approximately 65-75% linoleic acid and 6-10% oleic acid. GLA is a critical precursor to prostaglandin E1 (PGE1), a potent anti-inflammatory eicosanoid that modulates immune responses in the skin. Many inflammatory skin conditions, including atopic dermatitis and hormonal acne, are associated with impaired delta-6-desaturase enzyme activity, which limits the body's ability to convert linoleic acid into GLA. By providing preformed GLA, evening primrose oil bypasses this metabolic bottleneck and directly supports anti-inflammatory pathways. The oil has a rich golden color and a mild, slightly nutty aroma.
Rice water fermented with koji (Aspergillus oryzae). A traditional J-beauty ingredient used by geishas. Rich in ferulic acid, vitamins, and amino acids.
A plant-based antioxidant found in cell walls of plants like rice, wheat, and oats. Dramatically enhances the stability and efficacy of Vitamins C and E.
A catch-all term for scent compounds in cosmetics. Can comprise dozens of individual chemicals not individually listed.
A yeast ferment filtrate popularized by SK-II. Rich in vitamins, minerals, amino acids, and organic acids that improve skin clarity and hydration.
Ginkgo biloba is one of the oldest living tree species on Earth, and its leaf extract has been used in traditional medicine for centuries. The extract contains a complex mixture of bioactive compounds including flavonoid glycosides (primarily quercetin and kaempferol derivatives), terpene trilactones (ginkgolides A, B, C, and bilobalide), and proanthocyanidins. In skincare, ginkgo biloba extract is valued for its potent antioxidant capacity, its ability to improve microcirculation, and its anti-inflammatory effects mediated through inhibition of platelet-activating factor and modulation of cyclooxygenase and lipoxygenase pathways. The standardized extract typically contains 24% flavone glycosides and 6% terpene lactones. Its ability to scavenge superoxide anions, hydroxyl radicals, and peroxyl radicals makes it a versatile protective agent against environmental and UV-induced oxidative stress.
Ginseng extract is derived from the root of Panax ginseng, a perennial plant in the Araliaceae family that has been a cornerstone of traditional East Asian medicine for millennia. The principal bioactive compounds are ginsenosides (also called panaxosides), a diverse class of steroidal saponins with over 30 identified variants, each exhibiting distinct pharmacological activities. Ginsenosides Rb1, Rg1, and Rg3 are among the most studied for their dermatological effects. Topically, ginseng extract promotes collagen synthesis by stimulating type I procollagen production in fibroblasts, enhances microcirculation, and provides robust antioxidant defense by scavenging reactive oxygen species and upregulating endogenous antioxidant enzymes such as superoxide dismutase and catalase. Additionally, ginseng extract has been shown to inhibit melanogenesis through downregulation of tyrosinase activity, offering potential skin-brightening effects.
A polyhydroxy acid (PHA) that offers the gentlest chemical exfoliation. Larger molecular size means minimal irritation while still providing exfoliating and humectant benefits.
Glucosamine, most commonly used in skincare as N-acetyl glucosamine (NAG), is an amino monosaccharide and a natural precursor to hyaluronic acid, glycosaminoglycans, and glycoproteins in the skin. It is an acetylated derivative of glucosamine, an amino sugar naturally produced in the human body from glucose and the amino acid glutamine. In dermatological applications, NAG serves multiple functions: it stimulates the biosynthesis of hyaluronic acid by providing the building block N-acetylglucosamine directly to the hyaluronic acid synthase pathway in keratinocytes and fibroblasts. Additionally, NAG has been demonstrated to inhibit tyrosinase glycosylation, a post-translational modification necessary for tyrosinase maturation and activity, thereby reducing melanin production through a mechanism distinct from direct enzyme inhibition. This dual functionality as both a hydrating precursor and a depigmenting agent makes glucosamine a uniquely versatile ingredient in anti-aging and brightening skincare formulations.
A tripeptide antioxidant naturally produced in cells. Known for its skin-brightening properties through inhibition of melanin synthesis.
One of the most effective and well-studied humectants available. A sugar alcohol that draws water from the environment and deeper skin layers to hydrate the surface.
A widely used emulsifier that helps oil and water mix in cosmetic formulations. Also provides mild emollient properties.
The smallest AHA molecule, allowing deeper penetration. Glycolic acid exfoliates the skin surface by dissolving the bonds between dead skin cells.
Grape seed extract is derived from the seeds of Vitis vinifera (common grape) and is one of the richest natural sources of oligomeric proanthocyanidins (OPCs), a class of polyphenolic flavonoids with exceptional antioxidant capacity. The extract also contains gallic acid, catechins, epicatechins, and various procyanidins that collectively provide broad-spectrum free radical scavenging activity estimated to be 20 to 50 times more potent than vitamins C and E on a per-molecule basis. In the skin, grape seed extract protects against oxidative damage by neutralizing reactive oxygen and nitrogen species, chelating transition metals, and upregulating endogenous antioxidant enzyme systems including superoxide dismutase and catalase. Additionally, grape seed OPCs have demonstrated the ability to cross-link collagen fibers, enhancing the mechanical stability of the dermal matrix against enzymatic degradation.
Grape seed oil is a lightweight, versatile oil extracted from the seeds of Vitis vinifera, a byproduct of the winemaking industry. It is one of the lightest and most easily absorbed plant oils, with a nearly imperceptible scent and a smooth, silky texture. Its fatty acid profile is characterized by a very high linoleic acid content (60-76%), moderate oleic acid (12-25%), and small amounts of palmitic and stearic acids. This high linoleic acid composition makes it one of the most suitable plant oils for oily and acne-prone skin types. Grape seed oil is also an excellent source of proanthocyanidins (oligomeric proanthocyanidin complexes, or OPCs), which are among the most powerful antioxidants found in nature, with estimated free radical-scavenging potency 20-50 times greater than vitamins C and E. Additional bioactive constituents include tocopherols, tocotrienols, resveratrol, quercetin, carotenoids, and phytosterols.
Rich in polyphenols, particularly EGCG, which provides potent antioxidant and anti-inflammatory benefits for the skin.
Hemp seed oil is a lightweight, non-comedogenic plant oil extracted from the seeds of Cannabis sativa. It is exceptionally rich in polyunsaturated fatty acids, containing an optimal omega-6 to omega-3 ratio of approximately 3:1, which closely mirrors the lipid profile of healthy human skin. The oil is composed of roughly 55-60% linoleic acid, 15-20% alpha-linolenic acid, and 10-15% oleic acid, along with gamma-linolenic acid (GLA), a rare anti-inflammatory fatty acid. Hemp seed oil also contains tocopherols (vitamin E), phytosterols, and trace amounts of carotenoids and minerals. Its molecular structure allows for rapid absorption without leaving a greasy residue, making it suitable for a wide range of skin types including oily and acne-prone complexions. Unlike CBD oil, hemp seed oil is derived exclusively from seeds and contains negligible levels of cannabinoids.
A chemical UVB filter commonly used in sunscreen formulations. Helps dissolve other sunscreen actives.
A natural humectant with antibacterial and wound-healing properties. Manuka honey is particularly valued for its high methylglyoxal (MGO) content.
Horse chestnut extract is derived from the seeds of Aesculus hippocastanum, a deciduous tree native to southeastern Europe. The principal bioactive compound is escin (also spelled aescin), a mixture of triterpene saponins that exhibits potent anti-inflammatory, anti-edematous, and venotonic properties. Escin works by reducing capillary permeability and improving venous tone through inhibition of hyaluronidase and elastase, enzymes that degrade the extracellular matrix surrounding blood vessels. In dermatology, horse chestnut extract is valued for its ability to reduce puffiness, improve microcirculation, and strengthen the vascular integrity of the skin. It also contains flavonoids such as quercetin and kaempferol, which provide additional antioxidant and anti-inflammatory support. The extract has been extensively studied in the context of chronic venous insufficiency and is now increasingly incorporated into topical skincare for its vascular benefits.
An extract from the houttuynia cordata plant, a staple in Korean skincare. Known for powerful anti-inflammatory and antibacterial properties.
A powerful humectant naturally found in skin that can hold up to 1000 times its weight in water. Draws moisture to the skin for plumping and hydrating effects.
Small fragments of hyaluronic acid (under 50 kDa) that can penetrate deeper into the skin than standard HA for enhanced hydration.
The most potent tyrosinase inhibitor for treating hyperpigmentation. Considered the gold standard for dark spot treatment but restricted in many countries.
A plant-derived cellulose polymer used as a thickener and film-former. Creates clear gel textures.
A next-generation retinoid ester that binds directly to retinoid receptors without requiring conversion. Marketed as gentle yet effective.
A synthetic emollient that provides a silky, non-greasy feel. Also functions as a penetration enhancer.
A synthetic emollient similar to isopropyl myristate but slightly less comedogenic. Provides smooth skin feel.
Technically a liquid wax ester, not an oil. Its composition closely resembles human sebum, making it exceptionally compatible with skin.
A natural compound produced by several species of fungi. Inhibits tyrosinase enzyme to reduce melanin production and brighten skin.
A gentle alpha hydroxy acid derived from milk. Larger molecular size than glycolic acid means slower, more gentle penetration. Also has humectant properties.
A probiotic-derived ingredient from Lactobacillus fermentation. Supports the skin microbiome and strengthens the skin barrier.
A polyhydroxy acid (PHA) that exfoliates while providing humectant and antioxidant benefits. Much gentler than AHAs.
A natural wax secreted by sheep sebaceous glands that closely mimics human skin lipids. Excellent for extremely dry skin.
An essential oil from lavender flowers with calming aromatherapeutic properties. Contains linalool and linalyl acetate.
Extract from the Glycyrrhiza glabra plant containing glabridin, a potent tyrosinase inhibitor. Combines brightening with anti-inflammatory benefits.
A citrus-scented terpene found in citrus peel oils. An EU-listed fragrance allergen commonly present in natural citrus-based products.
A naturally occurring terpene alcohol found in many essential oils. One of the EU-listed fragrance allergens that must be declared.
Linoleic acid is an essential polyunsaturated omega-6 fatty acid (C18:2, n-6) that the human body cannot synthesize endogenously, making dietary and topical sources necessary for optimal skin health. In the epidermis, linoleic acid is esterified into acylceramides, specifically ceramide 1 (EOS) and ceramide 9 (EOP), which are indispensable for proper lamellar body formation and the organization of the extracellular lipid matrix in the stratum corneum. A deficiency in linoleic acid leads to impaired barrier function, increased transepidermal water loss, and a characteristic scaly dermatitis. Notably, sebum from acne-prone individuals has been found to be relatively deficient in linoleic acid, and topical application has been shown to reduce comedone size and improve acne outcomes.
Linolenic acid, specifically alpha-linolenic acid (ALA, C18:3, n-3), is an essential polyunsaturated omega-3 fatty acid that serves as the parent compound for the longer-chain omega-3 fatty acids EPA and DHA. In the skin, alpha-linolenic acid contributes to cell membrane fluidity, supports anti-inflammatory signaling cascades, and participates in maintaining barrier lipid homeostasis. As a precursor to anti-inflammatory eicosanoids including resolvins and protectins, it helps modulate the inflammatory response in conditions such as atopic dermatitis, psoriasis, and UV-induced skin damage. While less directly integrated into ceramide structures than linoleic acid, alpha-linolenic acid plays a complementary role in skin barrier maintenance by influencing lipid metabolism and reducing inflammation-mediated barrier disruption.
Magnesium ascorbyl phosphate (MAP) is a stable, water-soluble derivative of L-ascorbic acid in which the hydroxyl group at the C-2 position is esterified with a phosphate group and complexed with magnesium. This molecular modification dramatically improves the oxidative stability of the vitamin C molecule while preserving its biological activity upon enzymatic conversion in the skin. MAP is cleaved by phosphatases in the epidermis to release free ascorbic acid, which then participates in collagen synthesis, melanin inhibition, and antioxidant defense. Like sodium ascorbyl phosphate, MAP operates effectively at a neutral to slightly alkaline pH, making it an excellent choice for individuals who cannot tolerate the low-pH formulations required by pure L-ascorbic acid. MAP has also demonstrated a notable hydrating effect, distinguishing it from other vitamin C derivatives that can cause dryness.
An alpha hydroxy acid naturally found in apples. Provides moderate exfoliation and also functions as a pH adjuster.
An alpha hydroxy acid derived from bitter almonds with a large molecular size, making it one of the gentlest AHAs available.
Mango butter is a rich, semi-solid fat extracted from the kernel of the Mangifera indica fruit. It is obtained through cold-pressing or solvent extraction of the large flat seed found inside the mango pit. At room temperature, it has a creamy, buttery consistency similar to shea butter but with a slightly firmer texture that melts readily upon contact with skin. Its fatty acid composition is dominated by oleic acid (38-50%) and stearic acid (30-45%), with smaller amounts of palmitic acid (6-12%), linoleic acid (3-9%), and arachidic acid (1-4%). This profile gives mango butter excellent emollient and occlusive properties while maintaining a non-greasy feel. The unsaponifiable fraction contains triterpenes, tocopherols (vitamin E), phytosterols (stigmasterol and beta-sitosterol), and allantoin-like compounds. Mango butter has traditionally been used in tropical regions for sun protection, wound healing, and as a treatment for dry, cracked skin, particularly on the hands and feet.
Manuka honey is a monofloral honey produced by bees that forage primarily on the flowers of Leptospermum scoparium (manuka bush), a plant native to New Zealand and southeastern Australia. What distinguishes manuka honey from conventional honeys is its exceptionally high concentration of methylglyoxal (MGO), a compound derived from the conversion of dihydroxyacetone (DHA) present in manuka nectar. MGO is responsible for the non-peroxide antibacterial activity (NPA) unique to manuka honey, which persists even when the hydrogen peroxide-based antibacterial activity common to all honeys is neutralized. Medical-grade manuka honey is standardized using the Unique Manuka Factor (UMF) rating or MGO concentration. In addition to MGO, manuka honey contains a complex matrix of sugars, amino acids, organic acids, vitamins, minerals, enzymes, and phenolic compounds. Its high osmolarity draws moisture into the skin, its acidic pH of approximately 3.5 to 4.5 supports the acid mantle, and its anti-inflammatory properties are mediated through suppression of reactive oxygen species and modulation of immune cell activity.
Marula oil is a luxurious, fast-absorbing oil cold-pressed from the kernels of the fruit of the Sclerocarya birrea tree, indigenous to southern and eastern Africa. The oil has been used for centuries in traditional African skincare and is prized for its exceptional oxidative stability, which far surpasses many other popular plant oils. This stability is attributed to its unique fatty acid composition: approximately 70-78% oleic acid (omega-9), 4-7% linoleic acid, and 4-6% palmitic acid, combined with a remarkably high concentration of antioxidants including tocopherols (vitamin E), catechins, flavonoids, and procyanidins. Marula oil contains nearly 60% more vitamin E than argan oil, contributing to its superior resistance to rancidity and its potent free radical-scavenging properties. The oil is lightweight, non-greasy, and absorbs rapidly, making it an elegant and effective moisturizing ingredient.
A synthetic dye with potent antioxidant properties that has shown promise in anti-aging research. Can neutralize mitochondrial free radicals.
One of the most common paraben preservatives used in cosmetics. Effective at preventing mold and yeast growth.
A patented water-soluble UVA filter developed by L'Oreal. Provides excellent UVA protection and is very photostable.
A highly refined, colorless, and odorless oil derived from petroleum. An effective occlusive and emollient despite being controversial in clean beauty.
A traditional Korean herbal extract rich in vitamins and minerals. Widely used in K-beauty for calming sensitive and irritated skin.
Mulberry extract is derived from the root bark, leaves, or fruit of Morus alba (white mulberry), a deciduous tree in the Moraceae family with a long history in traditional Chinese and Korean medicine. The extract is rich in stilbenes, flavonoids, and benzofuran derivatives, with the most pharmacologically significant compounds being mulberroside A, oxyresveratrol, and kuwanon G. Mulberry extract is one of the most effective natural tyrosinase inhibitors available, with studies showing that mulberroside A and its metabolite oxyresveratrol can inhibit tyrosinase activity with potency comparable to or exceeding that of arbutin and kojic acid. Tyrosinase is the rate-limiting enzyme in melanin biosynthesis, and its inhibition reduces the production of both eumelanin and pheomelanin. In addition to its brightening properties, mulberry extract provides antioxidant and anti-inflammatory effects that address the broader cascade of events leading to hyperpigmentation.
Various mushroom species used in skincare, including Tremella (Snow Mushroom) for hydration, Reishi for anti-aging, and Chaga for antioxidant protection.
An amino sugar that inhibits melanin production and is a precursor to hyaluronic acid synthesis in the skin.
An extract from the neem tree with broad antibacterial, antifungal, and anti-inflammatory properties. Used traditionally in Ayurvedic medicine.
A versatile form of Vitamin B3 that strengthens the skin barrier, reduces pore appearance, controls oil production, and addresses multiple skin concerns.
A widely used chemical UVB filter. Lightweight and cosmetically elegant but has faced environmental scrutiny.
A chemical UV filter that absorbs UVB and short UVA rays. Also acts as a photostabilizer for avobenzone.
A monounsaturated omega-9 fatty acid abundant in olive oil and many other plant oils. Provides deep moisturization.
Olive oil is one of the oldest known oils used in human skincare, with documented use dating back to ancient Egyptian, Greek, and Roman civilizations. It is pressed from the fruit of the Olea europaea tree and is composed predominantly of oleic acid (65-80%), with smaller amounts of palmitic acid (7-14%), linoleic acid (4-12%), and stearic acid (1-4%). Extra virgin olive oil (EVOO) retains the highest concentration of bioactive phenolic compounds, including hydroxytyrosol, oleuropein, oleocanthal, and tyrosol, which are among the most potent natural antioxidants ever studied. Hydroxytyrosol in particular has an ORAC value estimated to be 10 times that of green tea catechins. The oil also contains squalene (up to 0.7%), phytosterols, and fat-soluble vitamins A, D, E, and K. Despite its long history, modern dermatological research has revealed a more nuanced picture of olive oil's suitability for topical use, particularly regarding its potential to disrupt skin barrier function in certain individuals.
Omega-3 fatty acids represent a family of polyunsaturated fatty acids characterized by a double bond at the third carbon from the methyl end of the carbon chain. The principal bioactive omega-3 fatty acids in skincare include eicosapentaenoic acid (EPA, C20:5) and docosahexaenoic acid (DHA, C22:6), which are long-chain derivatives of alpha-linolenic acid. In the skin, omega-3 fatty acids are incorporated into cell membrane phospholipids where they influence membrane fluidity, receptor function, and cell signaling. They serve as substrates for the synthesis of anti-inflammatory and pro-resolving lipid mediators including prostaglandin E3, leukotriene B5, resolvins, protectins, and maresins. These mediators actively promote the resolution of inflammation rather than merely suppressing it, making omega-3 fatty acids uniquely valuable in managing chronic inflammatory skin conditions.
Omega-6 fatty acids are a family of polyunsaturated fatty acids distinguished by a double bond at the sixth carbon from the methyl terminus. The most dermatologically significant omega-6 fatty acids include linoleic acid (LA, C18:2), gamma-linolenic acid (GLA, C18:3, n-6), and arachidonic acid (AA, C20:4). Linoleic acid is the essential dietary precursor, while GLA is its first metabolic product formed by the enzyme delta-6-desaturase. In the epidermis, linoleic acid is uniquely required for the synthesis of omega-hydroxy ceramides (acylceramides), which are indispensable for the proper formation of the corneocyte lipid envelope and the lamellar lipid organization of the stratum corneum. GLA, found abundantly in evening primrose oil, borage oil, and blackcurrant seed oil, exerts anti-inflammatory effects by competing with arachidonic acid for cyclooxygenase and lipoxygenase enzymes, shifting the eicosanoid profile toward less inflammatory mediators such as PGE1 and 15-HETrE.
Omega-9 fatty acids are monounsaturated fatty acids characterized by a single double bond at the ninth carbon from the methyl end. The most prevalent and dermatologically relevant omega-9 is oleic acid (C18:1, n-9), which is the primary fatty acid in olive oil, avocado oil, macadamia nut oil, and sweet almond oil. Unlike omega-3 and omega-6 fatty acids, omega-9s are not classified as essential because the body can synthesize them endogenously. In the skin, oleic acid is a major component of sebum and contributes to the surface lipid film that provides the first line of defense against environmental insults and microbial invasion. Oleic acid functions as an effective emollient and penetration enhancer, increasing the permeability of the stratum corneum by disrupting the ordered packing of intercellular lipids. This dual nature makes it simultaneously beneficial as a moisturizing agent and potentially problematic for individuals with already compromised skin barriers.
A collagen-stimulating peptide that mimics the pro-collagen I fragment. The original Matrixyl peptide with strong clinical data.
An anti-inflammatory peptide that reduces IL-6 secretion, helping to prevent chronic inflammation-driven skin aging (inflammaging).
A signal peptide that mimics a fragment of collagen to stimulate new collagen and fibronectin production in the skin.
The provitamin form of Vitamin B5 that deeply hydrates and helps repair the skin barrier. Converts to pantothenic acid in the skin.
A common emulsifier that creates stable oil-in-water emulsions. Often paired with glyceryl stearate.
A multifunctional ingredient that provides hydration while also offering antimicrobial preservation benefits.
Short chains of amino acids that act as building blocks for proteins like collagen, elastin, and keratin. Different peptides serve different signaling functions in the skin.
A highly refined petroleum-derived occlusive that creates a protective barrier on skin. One of the most effective moisturizing ingredients known.
A widely used preservative in cosmetics that prevents microbial growth. Considered a safer alternative to parabens.
A gentle acid derived from rice bran and seeds. Acts as a mild exfoliant, antioxidant, and chelating agent.
Phytosphingosine is a long-chain sphingoid base that serves as a direct biosynthetic precursor to ceramides, the dominant lipid class in the stratum corneum. It is an 18-carbon amino alcohol with a characteristic 4-hydroxy group that distinguishes it from sphingosine. In the skin, phytosphingosine is enzymatically acylated to form ceramides, particularly the acylceramide species essential for lamellar body formation and extracellular lipid organization. Beyond its role as a ceramide precursor, phytosphingosine exhibits intrinsic antimicrobial activity against common skin pathogens including Propionibacterium acnes and Staphylococcus aureus, and it possesses notable anti-inflammatory properties mediated through modulation of pro-inflammatory cytokine release.
A fermentation-derived humectant that holds 4-5 times more water than hyaluronic acid. Also inhibits hyaluronidase to preserve skin's natural HA.
A mild, plant-derived emulsifier suitable for sensitive skin formulations. Creates stable O/W emulsions.
A class of gentle exfoliating acids with larger molecular size than AHAs. Provide exfoliation with added humectant and antioxidant benefits.
A mild non-ionic surfactant and emulsifier used to solubilize oils and fragrances into water-based products.
A non-ionic emulsifier used in heavier cream formulations. Helps stabilize oil-in-water emulsions.
Pomegranate extract is derived from the fruit, peel, and seeds of Punica granatum, a plant with a long history of medicinal use across multiple traditional medicine systems. The extract is exceptionally rich in ellagitannins (particularly punicalagin), ellagic acid, anthocyanins, flavonoids, and punicic acid, a conjugated linolenic acid with potent anti-inflammatory properties. In skincare, pomegranate extract provides multi-pathway antioxidant protection that addresses both lipid peroxidation and protein oxidation. Its polyphenols have been shown to inhibit UVB-induced MMP-1 expression, protecting dermal collagen from photodegradation. Punicalagin, the predominant ellagitannin in pomegranate, is one of the highest molecular weight polyphenols found in nature and is hydrolyzed in the skin to release ellagic acid, which further contributes to tyrosinase inhibition and anti-melanogenic activity.
A food-grade preservative commonly used in natural and clean beauty formulations. Effective against yeast and mold.
Probiotics in skincare refer to live microorganisms, their lysates, fermentation byproducts, or cell-free extracts that confer a benefit to the skin by modulating the cutaneous microbiome and immune response. The human skin harbors a diverse community of bacteria, fungi, and viruses collectively known as the skin microbiome, which plays a critical role in barrier defense, immune regulation, and protection against pathogenic colonization. Topical probiotics work by reinforcing the populations of beneficial commensal organisms, producing antimicrobial peptides such as bacteriocins, and modulating toll-like receptor signaling to reduce excessive inflammatory responses. Common probiotic species used in skincare include Lactobacillus, Bifidobacterium, and Streptococcus thermophilus, often delivered as ferment lysates or filtrates for improved stability.
A resinous substance collected by honeybees from tree buds. Rich in flavonoids, phenolic acids, and other bioactive compounds with antimicrobial and anti-inflammatory properties.
A synthetic humectant and penetration enhancer. Draws water to the skin and helps other ingredients absorb more effectively.
An extract from French maritime pine bark rich in procyanidins. A potent antioxidant with anti-inflammatory and collagen-protective properties.
Resveratrol is a naturally occurring polyphenolic stilbene compound found in the skins of red grapes, Japanese knotweed, peanuts, and various berries. It functions as a phytoalexin, produced by plants in response to injury or pathogenic attack, and has been extensively studied for its potent antioxidant, anti-inflammatory, and anti-aging properties. In skincare, the trans-isomer of resveratrol is the biologically active form, capable of scavenging free radicals, chelating pro-oxidant metals, and modulating multiple signaling pathways including NF-kB, SIRT1, and Nrf2. These molecular actions translate into measurable protection against photoaging, improved skin barrier function, and enhanced cellular longevity. Resveratrol also exhibits antimicrobial properties that may benefit acne-prone skin.
A form of Vitamin A one conversion step closer to retinoic acid than retinol. More potent than retinol but gentler than tretinoin.
Retinaldehyde, also known as retinal, is the aldehyde form of vitamin A and sits one enzymatic conversion step away from the biologically active retinoic acid. This makes retinaldehyde significantly more potent than retinol (which requires two conversion steps) while remaining available without prescription. Retinaldehyde is converted to retinoic acid by retinaldehyde dehydrogenases present in the epidermis and dermis, allowing it to exert near-prescription-strength effects on gene transcription through binding to retinoic acid receptors and retinoid X receptors. Uniquely among cosmetic retinoids, retinaldehyde possesses direct antibacterial activity against Cutibacterium acnes, making it particularly suitable for acne-prone skin that also shows signs of aging. Its clinical efficacy approaches that of low-concentration tretinoin while maintaining a more favorable tolerability profile.
A derivative of Vitamin A and one of the most studied anti-aging ingredients in skincare. Retinol accelerates cell turnover and stimulates collagen production.
Retinyl palmitate is a pre-formed ester of retinol (vitamin A) and palmitic acid, making it one of the mildest and most stable forms of vitamin A used in over-the-counter skincare. As a prodrug, retinyl palmitate must undergo a two-step enzymatic conversion in the skin: first to retinol by esterases, and then to retinoic acid by retinol dehydrogenases and retinaldehyde dehydrogenases. This conversion pathway means that retinyl palmitate delivers a slower, more gradual release of the active retinoic acid form, resulting in less irritation but also reduced potency compared to retinol or prescription retinoids. It is commonly found in moisturizers, eye creams, and anti-aging formulations designed for sensitive or retinoid-naive skin. Its ester bond provides greater chemical stability against oxidation compared to free retinol.
Various rice derivatives including rice bran oil, rice ferment filtrate (sake/pitera), and rice water. Rich in ferulic acid, gamma-oryzanol, and amino acids.
Rose water is a hydrosol produced by the steam distillation of Rosa damascena (Damask rose) or Rosa centifolia (cabbage rose) petals. This ancient botanical preparation retains water-soluble volatile compounds including citronellol, geraniol, nerol, linalool, and phenylethyl alcohol, which contribute to its characteristic aroma and biological activity. Rose water has been used in skincare and medicine across Middle Eastern, South Asian, and Mediterranean cultures for centuries. It possesses mild astringent, anti-inflammatory, and antimicrobial properties. The phenylethyl alcohol component demonstrates activity against a broad spectrum of bacteria and fungi. Rose water also contains trace amounts of flavonoids and anthocyanins that provide gentle antioxidant protection. Its near-neutral pH and gentle composition make it one of the most universally tolerated botanical ingredients, suitable even for the most sensitive and reactive skin types.
Cold-pressed oil from the seeds of wild rose bushes. Rich in essential fatty acids, Vitamin A (trans-retinoic acid), and Vitamin C.
An extract from rosemary leaves rich in carnosic acid and rosmarinic acid. Used as both an antioxidant active and natural preservative.
A plant-derived carbohydrate complex that binds to the skin surface and provides long-lasting hydration (up to 72 hours).
A ferment from baker's yeast rich in beta-glucans, amino acids, and B vitamins. Supports skin barrier and provides multiple skin benefits.
An oil-soluble beta hydroxy acid that penetrates into pores to dissolve excess sebum and dead skin cells. The go-to ingredient for acne-prone and oily skin.
A combination of salicylic acid and phytosphingosine (a ceramide precursor). Provides gentle exfoliation while supporting barrier repair.
Sea buckthorn oil is a vibrant orange-red oil derived from the berries and seeds of the Hippophae rhamnoides shrub, a hardy plant native to the coastal and mountainous regions of Europe and Asia. Two distinct oils are obtained from this plant: the seed oil, which is lighter in color and rich in alpha-linolenic and linoleic acids, and the fruit/berry oil, which is deeply pigmented due to exceptionally high concentrations of carotenoids, particularly beta-carotene and lycopene. Both forms are extraordinarily rich in bioactive compounds including vitamins A, C, E, and K, flavonoids, phytosterols, and the rare palmitoleic acid (omega-7), which is a major component of human skin lipids and plays a critical role in cell signaling and wound healing. Sea buckthorn oil is one of the few plant sources of all four omega fatty acids (3, 6, 7, and 9), making it one of the most nutritionally complete botanical oils available for topical skincare.
Rich butter extracted from the nuts of the African shea tree. Contains fatty acids, vitamins A and E, and anti-inflammatory compounds.
Secretion from Cryptomphalus aspersa snails, rich in glycoproteins, hyaluronic acid, glycolic acid, and antimicrobial peptides.
Sodium ascorbyl phosphate (SAP) is a stable, water-soluble, phosphorylated ester derivative of L-ascorbic acid that was developed to overcome the significant stability limitations of pure vitamin C in cosmetic formulations. Unlike L-ascorbic acid, which rapidly oxidizes when exposed to air, light, and water, SAP maintains its structural integrity across a wide pH range and converts to free ascorbic acid upon contact with skin phosphatases in the epidermis. This enzymatic cleavage releases active ascorbic acid directly at the site of application. SAP functions effectively at a neutral pH of around 7, which is considerably more comfortable for sensitive skin compared to the low-pH environment required by L-ascorbic acid formulations. While SAP is less potent on a molar basis than direct L-ascorbic acid application, its superior stability means that the actual delivered dose of active vitamin C over the product shelf life may be more consistent.
A food-grade preservative effective against bacteria. Commonly used in natural formulations paired with potassium sorbate.
The sodium salt of hyaluronic acid with a smaller molecular weight, allowing deeper penetration into the skin compared to standard hyaluronic acid.
A strong alkaline compound used to adjust the pH of cosmetic formulations. Essential for activating certain thickeners like carbomers.
A milder variant of SLS created through ethoxylation. Provides good cleansing with less irritation potential.
A powerful anionic surfactant used in cleansers and shampoos. Effective at removing oils and dirt but can be harsh on sensitive skin.
Sodium PCA (sodium pyrrolidone carboxylic acid, also known as sodium pidolate) is the sodium salt of pyroglutamic acid, a naturally occurring amino acid derivative that constitutes approximately 12% of the natural moisturizing factor (NMF) in human stratum corneum. NMF is the collection of water-soluble, hygroscopic molecules produced during the terminal differentiation of keratinocytes from the degradation of the protein filaggrin. As the single largest component of NMF, PCA plays a critical role in maintaining stratum corneum hydration, plasticity, and barrier function. Sodium PCA is a remarkably efficient humectant, capable of absorbing moisture from the atmosphere at humidity levels as low as 50%. Its hygroscopic capacity exceeds that of glycerin, propylene glycol, and sorbitol under equivalent conditions. In cosmetic formulations, sodium PCA helps replicate the natural hydration mechanisms of healthy skin, making it particularly valuable for dehydrated, dry, and mature skin types where NMF levels are typically diminished.
A natural preservative found in berries of the mountain ash tree. Effective against mold and yeast.
A non-ionic emulsifier derived from sorbitol and oleic acid. Creates water-in-oil emulsions.
Soy extract is derived from the seeds of Glycine max (soybean), one of the most extensively researched botanical ingredients in dermatology. The extract contains a complex array of bioactive compounds including isoflavones (genistein, daidzein, glycitein), soybean trypsin inhibitor (STI), Bowman-Birk inhibitor (BBI), proteins, peptides, and phospholipids. Genistein is a potent phytoestrogen and antioxidant that modulates estrogen receptor signaling in the skin, promoting collagen synthesis and improving skin elasticity, particularly relevant for menopausal skin changes. STI and BBI inhibit protease-activated receptor 2 (PAR-2)-mediated melanosome transfer from melanocytes to keratinocytes, providing a depigmenting effect without affecting melanin synthesis itself. This unique mechanism makes soy extract one of the gentler approaches to addressing hyperpigmentation.
An extract from soybeans containing isoflavones (genistein, daidzein) with estrogen-like activity. Used for brightening and anti-aging.
A lightweight, stable oil that mimics the skin's natural sebum. Derived from olives or sugarcane (plant-based squalane) or traditionally from shark liver.
A saturated fatty acid found naturally in animal and vegetable fats. Used as an emulsifier, thickener, and skin-conditioning agent.
A dicarboxylic acid naturally found in amber and sugar cane. Shows promise as an antibacterial and anti-inflammatory agent for acne.
An ancient mineral remedy with antibacterial and keratolytic properties. Particularly effective for inflammatory acne and seborrheic dermatitis.
Sunflower seed oil is a widely available, cost-effective plant oil expressed from the seeds of Helianthus annuus. The high-linoleic variety, which is the type most valued for skincare, contains approximately 60-72% linoleic acid, 15-20% oleic acid, and smaller amounts of palmitic and stearic acids. It is one of the most well-studied plant oils for dermatological use, with robust clinical evidence supporting its barrier-repairing and anti-inflammatory properties. Sunflower seed oil is naturally rich in vitamin E (primarily alpha-tocopherol), phospholipids, and lecithin, all of which contribute to its emollient and skin-protective effects. Its light texture, neutral scent, and excellent spreadability make it a staple ingredient in moisturizers, cleansing oils, and baby skincare products. It is also frequently used as a carrier oil for essential oils and other active botanical extracts.
A thick, dark green oil from the nut of the tamanu tree. Known for its wound-healing and anti-inflammatory properties.
An essential oil from the Australian Melaleuca alternifolia plant with natural antibacterial, antifungal, and anti-inflammatory properties.
Tetrahexyldecyl ascorbate (THDA), also known as ascorbyl tetraisopalmitate, is a lipid-soluble ester derivative of L-ascorbic acid created by linking four 2-hexyldecanoic acid chains to the ascorbic acid molecule. This lipophilic modification fundamentally changes the skin penetration profile of vitamin C, allowing THDA to traverse the lipid-rich stratum corneum far more efficiently than water-soluble forms. Once inside the skin, cellular esterases cleave the ester bonds to release free ascorbic acid directly within the cells. THDA is one of the most stable vitamin C derivatives available, resistant to oxidation by air and light, and effective across a wide pH range including neutral pH. Its oil-soluble nature makes it particularly suitable for anhydrous formulations, facial oils, and emulsion-based products, and it is well tolerated even by sensitive and rosacea-prone skin types.
A patented skin-brightening compound developed by Beiersdorf that inhibits tyrosinase with high potency and stability.
A particulate UV filter that absorbs and reflects UV radiation. Provides broad-spectrum protection and stabilizes other UV filters.
A photostable broad-spectrum UV filter covering both UVA and UVB. Approved in EU and Asia but not yet FDA-approved.
A mineral UV filter that provides broad-spectrum protection by reflecting and scattering UV rays. One of two FDA-approved mineral sunscreen actives.
Natural form of Vitamin E used both as an antioxidant skin benefit and to prevent product oxidation.
A stable ester form of Vitamin E. More stable than pure tocopherol but requires enzymatic conversion in the skin to become active.
Originally used as an anti-hemorrhagic medication, tranexamic acid has emerged as a powerful treatment for hyperpigmentation and melasma.
The topical form of tranexamic acid used for treating melasma and hyperpigmentation. Works by inhibiting plasminogen activator in keratinocytes.
The most potent form of Vitamin A available by prescription. Tretinoin is the gold standard for anti-aging and acne treatment.
A medium-depth chemical peel agent used professionally for treating acne scars, wrinkles, and hyperpigmentation.
An alkaline amino alcohol used as a pH adjuster and emulsifier. Creates salt-based emulsifiers when combined with fatty acids.
A spice derived from Curcuma longa root containing curcumin, a potent anti-inflammatory and antioxidant compound with traditional Ayurvedic skincare uses.
A natural component of the skin's NMF (Natural Moisturizing Factor). At different concentrations, it hydrates, exfoliates, or treats hyperkeratotic conditions.
A photostable UVA filter with excellent safety profile. One of the newer generation UV filters approved in EU.
The acid form of panthenol (provitamin B5). Supports skin barrier function, wound healing, and hydration.
A powerful antioxidant that brightens skin, boosts collagen production, and protects against environmental damage including UV and pollution.
A fat-soluble antioxidant that protects cell membranes from oxidative damage. Works synergistically with Vitamin C for enhanced photoprotection.
Vitamin K is a group of fat-soluble vitamins essential for blood coagulation and calcium metabolism, with two primary forms relevant to skincare: phytonadione (vitamin K1) and menaquinone (vitamin K2). In dermatological applications, vitamin K is primarily used for its ability to support proper blood clotting at the capillary level, which makes it valuable for reducing the appearance of dark circles under the eyes, spider veins, bruising, and post-procedural purpura. Topical vitamin K works by activating clotting factors that depend on gamma-carboxyglutamic acid residues, thereby accelerating the resolution of extravasated blood in the dermis. Additionally, vitamin K2 has been shown to influence skin elasticity through its role in activating matrix Gla protein, which regulates soft tissue calcification.
Willow bark extract is derived from the bark of various Salix species, most commonly Salix alba (white willow) and Salix nigra (black willow). It is historically significant as the natural precursor to aspirin and contains salicin, a beta-glucoside of salicyl alcohol that is metabolized to salicylic acid upon enzymatic hydration. In topical skincare, willow bark extract functions as a natural source of beta-hydroxy acid (BHA), providing gentle exfoliation, pore-clearing activity, and anti-inflammatory benefits. Unlike synthetic salicylic acid, willow bark extract delivers salicin gradually, resulting in a slower and more sustained release of salicylic acid that is generally better tolerated by sensitive skin. The extract also contains polyphenols including flavonoids and tannins that contribute additional antioxidant, astringent, and antimicrobial properties. This combination of exfoliating and soothing activity makes willow bark extract particularly appealing for acne-prone and combination skin types.
A natural astringent derived from the bark and leaves of the Hamamelis virginiana plant. Traditionally used to tone skin and reduce inflammation.
A natural polysaccharide produced by bacterial fermentation. Used as a thickener and stabilizer in cosmetic formulations.
An extract from the yuzu citrus fruit, popular in J-beauty. Rich in vitamin C, hesperidin, and limonene.
A mineral UV filter that sits on the skin surface and reflects/scatters UV radiation. Provides broad-spectrum UVA and UVB protection.
A zinc salt of PCA (pyrrolidone carboxylic acid, a natural component of skin's NMF). Regulates sebum production while maintaining skin hydration.