The bridge from genes changed to cell function changed is still half-built, and most of the published work leans on dermal fibroblasts, with far less on the cardiac, lung, or joint varieties, which makes generalizing across tissue types shakier than it sounds
Optional Add-Ons: Some providers may modify the infusion with additional ingredients such as glutathione, an antioxidant involved in detoxification, or zinc, which plays a role in immune system function
GSH production in tumours is dispensable GSH facilitates tumorigenesis 17,18,19
William A
Notably, endogenous GHK-Cu levels in human plasma are age-dependent, dropping from ~200 ng/mL at age 20 to below 80 ng/mL after age 60