fda warning letters bpc-157 sellers Four-of-seven unapproved peptides get the green light from panel FDA Issues Warning Letters Against

Free Cu2+ is toxic (Fenton reactions, hydroxyl radicals), but the GHK-Cu complex is stable, diffusible and delivers copper in a targeted manner to copper-dependent metalloenzymes: lysyl oxidase (collagen/elastin crosslinking), Cu/Zn superoxide dismutase (SOD1, antioxidant defence), tyrosinase (controlled melanogenesis), dopamine-beta-hydroxylase

Gastric pentadecapeptide BPC 157 and soft tissue healing: review of literature

One is usually seen as more targeted, the other as more systemic, so using both is meant to cover more recovery pathways

Unregulated products also carry infection and contamination risks, so your surgeon will advise based on your procedure and medical history