## What is glutathione? Glutathione (which is the same as “L-glutathione” and “reduced” glutathione) is a peptide that our bodies produce and use as an antioxidant. You can also get it from supplements, but most of it is broken down by enzymes in the gut into amino acids, such that only long-term use of large amounts (500 mg or more) appears to modestly raise glutathione levels. It can also be taken as a supplement as a liposomal formulation or in the form of S-acetyl-glutathione, although these also appear to have limited impact on raising glutathione levels in the body.