Your body needs B12 for essential functions, so stopping suddenly may not be safe
GHK-Cu exhibits some potential to influence various biological pathways, including an apparent induction of tissue repair, attraction of immune cells, antioxidant and anti-inflammatory characteristics, activation of collagen and glycosaminoglycan synthesis in skin fibroblasts, regulation of extracellular matrix components like decorin, and possible promotion of blood vessel growth
Many are sold as research compounds rather than regulated supplements, and their evidence comes almost entirely from animal studies, not human trials
Whats more, both are banned banned substances in sport, appearing on the World Anti-Doping Authoritys prohibited list
BPC-157 is a 15-amino-acid gastric peptide focused on vascularization and protective mechanisms