Supplement With Whey Protein
Certain amino acids are required for the synthesis of glutathione in your body. In the synthesis of glutathione, the amino acid cysteine plays a particularly significant role.
Cysteine-rich foods, including whey protein, can help you produce more glutathione. It's widely known that whey protein builds muscles, but one of the most under-appreciated benefits of daily supplementation of whey protein is that it increases your body’s levels of glutathione. In fact, the evidence clearly backs up this claim, with numerous studies finding that whey protein may raise glutathione levels and thereby reduce oxidative stress. In a study from 2012, scientists found that whey protein reduced oxidative stress in human colon cancer cells, which they believed was made possible by the protein's increase in glutathione levels.