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This trial measured the effect of glutathione supplementation at 250 mg/day and 1,000 mg/day on glutathione levels in different blood components and exfoliated buccal mucosal cells over a six month period among 54 healthy adults (41 females/13 males), 28-72 years of age (mean = 46.6 years)

And in studies, people with high levels of vitamin C typically have high glutathione levels, as well

Alpha-lipoic acid improves sperm motility in infertile men after varicocelectomy: a triple-blind randomized controlled trial

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Protein Sources: Grass-fed beef, poultry, and fish contain the amino acids (cysteine, glycine, and glutamate) necessary for synthesis

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