Glutathione “OPITAC™” for food & nutrition grade is the only ingredient of its kind to hold U.S. FDA-Notified FULL GRAS status, is HALAL and KOSHER certified, and was the first to achieve JP & USP monograph designation. L-Glutathione Reduced is a tripeptide that exists in every human body cells. It serves as an antioxidant and removes free radicals from the body hence showing detoxification features by activating liver function. It is also shown to beautify the skin, and help to relieve muscle fatigue.