Hydroquinone
BrighteningAlso known as: HQ, Hydroquinol
The most potent tyrosinase inhibitor for treating hyperpigmentation. Considered the gold standard for dark spot treatment but restricted in many countries.
Routine placement
Serum · AM & PM
Time to results
6-12 weeks for visible brightening and dark spot fading
Most effective dark spot treatment, treats melasma, fades post-inflammatory hyperpigmentation, evens skin tone dramatically.
Use 2% (OTC) or 4% (prescription) for 3-6 months max, then take a break. Apply to dark spots only, not entire face. Evening use only with strict sun protection.
Gold standard for hyperpigmentation with strong evidence. Must be used cyclically (3-6 months on, then break) to avoid ochronosis. 2% OTC effective for many.
- pregnancy
- breastfeeding
- sulfite allergy
- dark skin types (risk of ochronosis with overuse)
Cautions
Can cause ochronosis (paradoxical darkening) with prolonged use. Irritating to sensitive skin. Banned or restricted in many countries. Requires strict sun protection.
What does Hydroquinone do for skin?
Hydroquinone is used in skincare primarily as a brightening ingredient. Its effects depend on concentration and formulation. Check the benefits section above for specific details.
Is Hydroquinone safe for sensitive skin?
Hydroquinone is generally well-tolerated, but sensitivity varies by individual. Start with a patch test if you have reactive skin, and introduce gradually into your routine.
Can I use Hydroquinone every day?
For most skin types, daily use is appropriate at standard concentrations. If you experience any irritation, reduce frequency to every other day.
How long does Hydroquinone take to fade dark spots?
Most brightening ingredients take 8-12 weeks of consistent daily use to show visible improvement in hyperpigmentation. Results vary by skin tone and spot severity.
Does your skincare contain Hydroquinone?
Paste your product's ingredient list to check, or create your Skinularity ID for a full routine.
Find Hydroquinone products
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