The H 2 O 2 is then transformed into H 2 O and O 2 by catalase
When severed nerves in animal models were placed in collagen tubes impregnated with GHK, researchers observed significantly increased nerve outgrowth, elevated production of nerve growth factor (NGF) and neurotrophins NT-3 and NT-4, accelerated regeneration of nerve fibers, and increased axon count and Schwann cell proliferation compared to controls
By removing excess melanin from the skin and preventing new melanin from being produced, skin lightening products and treatments effectively produce a lighter, brighter, more-even toned complexion
However, another randomized, double-blind, placebo-controlled trial in 181 patients with diabetic neuropathy found that oral supplementation with either 600 mg/day, 1,200 mg/day, or 1,800 mg/day of lipoic acid for five weeks significantly improved neuropathic symptoms (77)