So far GHK-Cu has the best research and it seems to have promise when used topically for cosmetic purposes
However, results vary, and it's important to maintain realistic expectations and follow a skincare regimen recommended by a dermatologist

What's inside What's inside Key Ingredients Benefits Ingredients Side-by-side Water Skin Conditioning Propanediol Solvent Glycerin Humectant Betaine Humectant S-Arachidonoyl/Linolenoyl/Linoleoyl Glutathione Antioxidant Acetyl Glutamine Skin Conditioning Sh-Oligopeptide-1 Skin Conditioning Sh-Oligopeptide-2 Skin Conditioning Sh-Polypeptide-1 Skin Conditioning Sh-Polypeptide-9 Skin Conditioning Sh-Polypeptide-11 Allantoin Skin Conditioning Bacillus Skin Conditioning Sodium Hyaluronate Humectant Lecithin Emollient Xanthan Gum Emulsifying Caprylyl Glycol Emollient Butylene Glycol Humectant Ammonium Acryloyldimethyltaurate/Vp Copolymer Tropolone Skin Conditioning 1,2-Hexanediol Skin Conditioning Water, Propanediol, Glycerin, Betaine, S-Arachidonoyl/Linolenoyl/Linoleoyl Glutathione, Acetyl Glutamine, Sh-Oligopeptide-1, Sh-Oligopeptide-2, Sh-Polypeptide-1, Sh-Polypeptide-9, Sh-Polypeptide-11, Allantoin, Bacillus, Sodium Hyaluronate, Lecithin, Xanthan Gum, Caprylyl Glycol, Butylene Glycol, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Tropolone, 1,2-Hexanediol Ingredients Explained These ingredients are found in both products

While they can be lifesaving in acute or emergency settings, repeated or long-term use is associated with well-documented steroid side effects affecting metabolic, immune, and musculoskeletal systems