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Galuppo et al
Researchers became interested in the combination after observing that glutathione levels tend to decline with age while oxidative stress, inflammation, and mitochondrial dysfunction increase.59 The idea is that providing both cysteine and glycine may help the body rebuild glutathione more efficiently than either nutrient alone
NAD+ is naturally occurring in the body, and supplementing with it is considered safe when taken as directed
Pickett CG, Lu AYH 1989 Glutathione-S-transferases: gene structure, regulation, and biological function
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