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Finally, administration of glutathione precursors such as whey protein, vitamin C, and glutamine, which are often recommended to boost glutathione levels in the body, typically does not raise the level of glutathione by a significant amount, require high doses to be effective, and cost significantly more than an equivalent amount of glutathione

Traverso, N

K., De Lange, E

Enhances Skin Brightening: The combination of L-Glutathione and Vitamin C may help reduce melanin production, fade dark spots and promote an even skin tone, resulting in a brighter complexion

Novel antioxidant peptides identified in millet bran glutelin-2 hydrolysates: purification, in silico characterization and security prediction, and stability profiles under different food processing conditions