Yes, but for different purposes
These injections contain a mix of vitamins, nutrients, and other ingredients that support weight loss, regulate sleep, increase energy, strengthen immunity, and offer various health benefits
Clinically, they are used for type 2 diabetes management and sometimes for chronic weight management in eligible adults
Medicine 83 , 342347 (2004)
That broader peptide chatter pulls all peptides up in attention (including GHK-Cu) regardless of whether the topical evidence is stronger than the injectable claims
requires daily dosing, has significant alcohol interaction, and is less effective for some patients PT-141 (bremelanotide): MC3R/MC4R agonist acting on hypothalamic sexual motivation circuits