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    Introducing 4-n-butylresorcinol

    Say farewell to dark spots and discoloration with the power of 4-n-butylresorcinol (4NB) (1). This potent tyrosinase inhibitor is clinically proven to erase dark spots, resulting in a clearer, more even skin tone (1). 

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    Check out the supporting evidence

    1.     Van Scott EJ. Control of Keratinization With a-Hydroxy Acids and Related Compounds:
    I. Topical Treatment of Ichthyotic Disorders. Arch Dermatol. 1974;110(4):586.

    2.     Ramos-e-Silva M, Celem LR, Ramos-e-Silva S, Fucci-da-Costa AP. Anti-aging cosmetics: Facts and controversies. Clin Dermatol. 2013;31(6):750-758.

    3.     Bernstein EF, Lee J, Brown DB, Yu R, Van Scott E. Glycolic Acid Treatment Increases Type I Collagen mRNA and Hyaluronic Acid Content of Human Skin. Dermatol Surg. 2001;27(5):429-433.

    4.     Smith WP. Epidermal and dermal effects of topical lactic acid. J Am Acad Dermatol. 1996;35(3):388-391.

    5.     Thibault PK, Wlodarczyk J, Wenck A. A Double-Blind Randomized Clinical Trial on the Effectiveness of a Daily Glycolic Acid 5% Formulation in the Treatment of Photoaging: Dermatol Surg. 1998;24(5):573-578.

    6.     Tang SC, Yang JH. Dual Effects of Alpha-Hydroxy Acids on the Skin. Molecules. 2018;23(4):863.