Every FOV gave one data point
A scientific review of four small-scale studies confirmed that glutathione use does result in some skin lightening.24 Additionally, glutathione has also been shown to decrease psoriasis when levels are bolstered by intake of whey protein, which contains glutamylcysteine, a precursor to GSH.25 Most impressively, perhaps the same studies mentioned above also show that glutathione doesn't just lighten, but it improves skin elasticity and decreases wrinkles' appearance
Matsushita M, Freigang S, Schneider C, Conrad M, Bornkamm GW, Kopf M
Tr li: C, t c kt qu tt nht, bn cn kin tr s dng Vin Ung Trng Da Glutathione 600 Dr Lacir trong thi gian d i
In the fifth step of the mechanism, which is the third chemical step, Tyr9 deprotonates the glutathione thiol, restoring the active site of the enzyme to the initial state
berichte der Deutschen Chemischen Gesellschaft (in German)