Will GHK-Cu help with loose skin?

It is researched for building collagen and renewing skin, which is linked to skin firmness. It is a long-standing, approved cosmetic ingredient on that basis. This site's review found no study in people, of shots or creams, that measured loose or saggy skin. So this is a reasonable stretch of its research, not a directly measured result.

Copper peptides for skin and hair: what real people saw

Copper peptides for skin and hair: what real people saw

Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use.

Part of healing and recovery peptides. BPC-157, TB-500, GHK-Cu, and the tissue repair family, including what actually has human data.