4-Butylresorcinol
BrighteningAlso known as: Rucinol, 4-n-Butylresorcinol
A potent tyrosinase and TRP-1 inhibitor for treating hyperpigmentation. One of the most effective non-hydroquinone brightening agents.
Potent brightening, inhibits melanin at multiple steps, treats melasma, fades post-inflammatory hyperpigmentation.
Apply in serum form. Typically used at 0.1-0.3%. Can be combined with other brightening ingredients.
Dual inhibition of tyrosinase and TRP-1 makes it one of the most potent topical depigmenting agents. Clinical studies show significant improvement in melasma.
Cautions
Generally well tolerated. Occasional mild irritation possible. Less research than established brighteners like hydroquinone.
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