For your skin
A gentle brightener that fades dark spots while quietly boosting hydration. Pairs especially well with niacinamide.
Want the science? Keep reading ↓Mechanism of action
Amino sugar that disrupts tyrosinase glycosylation in the Golgi, reducing functional tyrosinase reaching melanosomes, and serves as a precursor to hyaluronic acid in the dermis.
Why we tier this moderate
5 cited papers across 2 countries. The mechanism is well-described and there's at least one controlled trial in the literature, but we tier this Moderate rather than Strong to stay honest about how many specific papers we cite directly.
Cited research
Schlessinger J, Green B, Edison BL, Murphy L, Sabherwal Y, A Firming Neck Cream Containing N-Acetyl Glucosamine Significantly Improves Signs of Aging on the Challenging Neck and Decolletage, Journal of Drugs in Dermatology 2016;15(1):47-52
Hwang JS, Lee HY, Lim TY, Kim MY, Yoon TJ, Disruption of tyrosinase glycosylation by N-acetylglucosamine and its depigmenting effects in guinea pig skin and in human skin, Journal of Dermatological Science 2011;63(3):199-201
Kimball AB, Kaczvinsky JR, Li J, Robinson LR, Matts PJ, Berge CA, Miyamoto K, Bissett DL, Reduction in the appearance of facial hyperpigmentation after use of moisturizers with a combination of topical niacinamide and N-acetyl glucosamine: results of a randomized, double-blind, vehicle-controlled trial, British Journal of Dermatology 2010;162(2):435-41 — 10-week RCT (n=202) showed niacinamide + NAG reduced facial spots and hyperpigmentation beyond SPF 15 alone
Bissett DL, Farmer T, McPhail S, Reichling T, Tiesman JP, Juhlin KD, Hurley GJ, Robinson MK, Genomic expression changes induced by topical N-acetyl glucosamine in skin equivalent cultures in vitro, Journal of Cosmetic Dermatology 2007;6(4):232-8 — topical NAG reduced melanin production and modulated pigmentation-relevant gene expression in skin equivalents
Bissett DL et al., Reduction in the appearance of facial hyperpigmentation by topical N-acetyl glucosamine, Journal of Cosmetic Dermatology 2007;6(1):20-26 — split-face RCT; topical 2% NAG (alone and with niacinamide) reduced facial hyperpigmentation
Sources: 10 clinical journals and regulatory databases across the US, EU, Korea, Japan, and China. Every entry points to a specific document. See methodology for the full list and what each outcome label means.