Glutathione (GSH), a tripeptide composed of three amino acids (cysteine, glutamic acid and glycine), is an essential thiol antioxidant produced in all cells. GSH plays a key role in protecting against oxidative stress by neutralizing free radicals and reactive oxygen species (ROS). As people age, cellular levels of GSH decline1.

This ingredient can be found in the following products in United States:


  1. Ferguson G, Bridge W. Glutamate cysteine ligase and the age-related decline in cellular glutathione: The therapeutic potential of gamma-glutamylcysteine. Arch Biochem Biophys. 2016;593:12-23.