is ghk-cu naturally occurring in humans Peptides Before and After: Dosage, Benefits & How It Works for Skin and Hair The Human Tripeptide GHK-Cu in

GHK-Cu is understood to mimic the body's natural damage-response signaling in connective tissue: when tissue injury occurs, plasma GHK-Cu concentrations rise dramatically, triggering a cascade of repair processes that include fibroblast recruitment, collagen synthesis, and angiogenesis

Pharmacopsychiatry 50 , 513 (2017)

For any multi-dose use, bacteriostatic (BAC) water is essential, as its preservative prevents bacterial growth in the vial over time

While it is a very small amount of cyanide that you're getting, you are getting cyanide

For people with confirmed vitamin deficiency, injectable B12 is a clinically well-established and effective treatment