Glutathione is a tripeptide containing glutamic acid, cysteine and glycine. It is found in almost all cells of the body, where it acts as an antioxidant. Glutathione has many important roles in the body including purging harmful substances, immune function, protection from oxidative stress and regulation of gene expression. It also serves as a substrate for enzymes involved in purging of harmful foreign substances from the liver. This L-Glutathione is a glutathione supplement that is also known as glutathione reduced. It is naturally occurring antioxidant that is found in a reduced state in the human body. L-Glutathione also assists in the transportation of amino acids through the cell membranes and is a necessary chemical in the human body. In addition, glutathione is important for cardiovascular health, skin health, and cell function. Glutathione has also been reported to help improve athletic performance by reducing muscle fatigue. This L-Glutathione is the Glutathione Reduced and it is in powder form, as well as, does not contain any fillers, additives, and artificial flavors.