Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum 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 Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum People are turning themselves into lab rats': the injectable peptides craze sweeping the US Well actually The Guardian Subcutaneous Injection: What It Is and How to Give One