Research by Te-Sheng Chang found the lowest levels of reduced glutathione to be associated with eumelanin-type pigmentation, whereas the highest ones were associated with pheomelanin
But when a package of the substance was discovered by customs officials en route to a Tour de France cyclist in 2009, officials opened an investigation and WADA subsequently banned the drug
Vinaik R, Abdullahi A, Barayan D, Jeschke MG
GHK-Cu has the ability to stimulate the synthesis of collagen and glycosaminoglycans, which are essential components of the connective tissue, and thus help in the tightening of sagging skin
It is studied for potential roles in tissue repair, inflammation regulation, and gastrointestinal protection, but remains an investigational compound without approved medical use
Cancer The relationship between glutathione and cancer is complex and paradoxical