Pure Encapsulations Liposomal Glutathione features glutathione in a liposomal delivery system: BioGlute™ proprietary blend of glutathione and phosphatidylcholine with natural liposome formation due to the hydrophobic and hydrophilic nature of phospholipids. The liposomal form protects the glutathione from the possible degradation that can occur during digestion. Setria® Glutathione is bioavailable and in its biologically active reduced form.