Glutathione, also referred to as L-Glutathione, L-gammaglutamyl, L-cysteinylglycine or GSH, is a tripeptide naturally occurring in the body. Existing in almost every cell of the body, Glutathione is a small molecule made up of three amino acids: cysteine, glycine, and glutamic acid. Glutathione, however, must be generated within the cells before it can work effectively within the body. Glutathione is also used in repairing cellular damage from harmful free radicals and reducing oxidative stress. Glutathione is essential in protecting organs such as the liver, the eyes, skin, kidneys, brain, and heart.