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Longevity doctor Mark Hyman, M.D
Breaking your limits
These work by changing the color on just the outer layer of your skin (called the stratum corneum), and they dont end up in your bloodstream
The extensive preclinical literature should not be conflated with established human clinical efficacy
Water, dextrose, fructose, L-carnitine, Alpinia galanga (L.) Willd
A 2008 laboratory study examined the combination of niacinamide and retinoic acid (what retinol converts to in your skin) and found that niacinamide significantly reduced the irritation and dryness caused by retinoic acid [1]
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