For Glutathione Supplement Capsules Glutathione Powder Poudre De Glutathione L-glutathione Powder

For Glutathione Supplement Capsules Glutathione Powder Poudre De Glutathione L-glutathione Powder

Glutathione powder, typically referring to L-Glutathione Reduced, is a white crystalline powder composed of three amino acids: glutamic acid, cysteine, and glycine. It is the most abundant low-molecular-weight thiol in living cells and serves as a master antioxidant, directly neutralizing free radicals and reactive oxygen species. Beyond antioxidant defense, glutathione powder supports detoxification of xenobiotics and heavy metals, participates in immune function, and plays roles in cellular redox signaling.

Commercial glutathione powder is available in multiple grades. Food/cosmetic grade (≥98%, USP standard) is used in dietary supplements, functional foods, and skin-whitening products. Pharmaceutical grade may follow EP standards for injection or drug applications. Sigma-Aldrich offers a BioXtra grade (≥98.0%) suitable for cell culture applications. For supplements, reduced L-glutathione is the active form; oxidized glutathione (GSSG) is a common impurity that should be limited (typically ≤1.5%).