N Engl J Med 319:223226
GHK-Cu is analyzed for its copper-binding capacity and its resulting influence on extracellular matrix gene expression, including studies on collagen and elastin mRNA levels in lab models
Oral glutathione is largely broken down by stomach acid and digestive enzymes before it reaches the bloodstream, so traditional oral capsules have limited bioavailability
The peptide distributes systemically, benefiting not just hair but skin, wound healing, and other tissues throughout the body
Bertelli A, Giovannini L, Palla R, Migliori M, Panichi V, Andreini B: Protective effect of L-propionylcarnitine on cyclosporine-induced nephrotoxicity
Beef Steak: 56-162 mg per 4 oz A 4-ounce cut of steak has an estimated 56 mg to 162 mg of carnitine