NL GHK Cu (TETRAPEPTIDE + CU) Synthagen Synthagen PL NL GHK Cu (TETRAPEPTIDE + CU) Synthagen Synthagen PL Peptides BPC 157 promise to help heal and recover you from injuries and tough workouts (and do way more than that sometimes too!). But there's limited research into their effectiveness. So how do GHK Cu, is a naturally occurring copper peptide already found in the body Sometimes referred to as Botox in a bottle. , As we age, our natural levels of it declinewhich is why its often Copper peptides better than tretinoin? #dermreacts #tretinoin #copperpeptide Dr Dray Facebook