When glutathione is taken in a higher dosage, the pathway of melanin is altered and is proven to reverse the melanins metabolism turning dark pigmentations (eumelanin) into light pigmentations (phaeomelanin) by inhibiting and blocking the Tyrosinase enzyme
Recent Prog Horm Res
Bock KW, Schrenk D, Forster A, Griese EU, Morike K, Brockmeier D et al
doi: 10.1038/s41419-020-2298-2 67 ChenXKangRKroemerGTangD
In addition to its pro-differentiating actions, nicotinamide promotes neuronal survival, especially in oxidative stress environments, through various pathways, such as maintenance of protein kinase B (akt)-dependent phosphorylation of forkhead transcription factor (FOXO3a)
2) The study performed by Li et al employed a multi-pronged experimental design, integrating human tissue analysis, in vitro cell culture, and in vivo animal models to comprehensively investigate the role of FOXO4 in age-related male fertility and the therapeutic potential of FOXO4-DRI