Because glutathione is a tripeptide, the digestive process often breaks it back down into its individual amino acids (glycine, cysteine, and glutamine) before it ever reaches your bloodstream
Investigative Ophthalmology & Visual Science , 61 (13), 12
It is effective for the skin whitening, especially for ultraviolet-induced hyperpigmentation including melasma
doi:10.1007/s00253-023-12606-0
Glutathione can be found naturally in many fruits, vegetables, and lean meats, such as: Cruciferous vegetables (i.e., broccoli, cauliflower, and bok choy) Allium vegetables (i.e., garlic and onions) Eggs Lean proteins such as chicken and fish Along with exercising, a glutathione-rich diet poses little to no risk of adverse reactions, and supplementation may not be necessary for everyone