Glutathione (GSH) is a tripeptide that contains an unusual peptide linkage between the amine group of cysteine (which is attached by normal peptide linkage to a glycine) and the carboxyl group of the glutamate side-chain. It is an antioxidant, preventing damage to important cellular components caused by reactive oxygen species such as free radicals and peroxides.
Liposomal glutathione is glutathione encapsulated in liposomes (a type of carrier) with the aim of improving the absorption of glutathione by the body and enhancing its stability, and the bioavailability of glutathione in liposomal dosage form can be up to 100%.