Glutathione is a tripeptide, also a tiny protein which is composed of three amino acids: cysteine, glycine, and glutamic acid (or glutamate). Glutathione is an antioxidant produced in cells. 

Glutathione is largely known as antioxidants which are quite popular for their ability to minimize oxidative stress and the downstream negative effects thought to be associated with oxidative stress. Glutathione is the most significant antioxidant that can help prevent free radical damage to the skin. 

Applications: 

Used in personal care products. 

Use level: 

2.0-10.0 %.