Glutathione (GSH) is a small molecule composed of 3 amino acids, cysteine, glutamic acid and glycine. It is a powerful antioxidant found within every cell protecting our cells from free radicals.
This active sustance plays a role in nutrient the regulation of cellular events including gene expression, DNA and protein synthesis and repair, cell growth, and immune response, metabolism of toxins and carcinogens, enhancement of the immune system, and prevention of fat oxidation. It is involved in detoxification, binding itself to toxins such as heavy metals, chemical pollutants and carcinogens and transforming them into a form which can be easily flushed out of the body.
The body produces and stores the largest amounts of GSH in the liver, where it is used to detoxify harmful compounds. GSH levels decline with age, and a lack of glutathione has been shown to leave the body more vulnerable to damage by free radicals, thus speeding up aging processes. Glutathione neutralizes damaging free radicals and peroxide molecules, and recharges oxidized vitamin C and E so that the body may reuse it.
Glutathione has also been implicated in skin lightening. Studies show evidence of its involvement in the melanogenic pathway and its anti-melanogenic effect.