doi: 10.1016/0891-5849(88)90049-4 32 SunZ.WuX.GuZ
The measured purity figure is recorded on the batch COA not a marketing claim
What makes it buzzworthy is how it helps with detox pathways, fights oxidative stress, and, yes, lightens skin over time by slowing down melanin production
SAG itself is a white, almost odorless powder
Product can be dosed every 3-4 hours for even delivery throughout the day
Plus by eliminating free radicals, glutathione helps prevent premature skin aging (1), and research in Clinical, Cosmetic and Investigational Dermatology found that Setria Glutathione (a branded ingredient from Kyowa Hakko) taken orally in doses of 250mg per day may decrease melanin production (2)