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Arbutin inhibits tyrosinase activity competitively but at non-cytotoxic concentrations in a dose-dependent manner in cultured melanocytes
Cintra, P.A.F
A randomized, double-blind trial published in the European Journal of Nutrition found that daily oral glutathione at 1,000mg over six months increased glutathione levels by 30 to 35% in erythrocytes, plasma, and lymphocytes among 54 adults
Krasniak AE, Knipp GT, Svensson CK, Liu W
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