melanotan peptide reviews II MT-II Research – Peptagon Federal health advisers are meeting

97 Macrophages constitute the most abundant proportion of immune cells involved in homeostasis, representing approximately 20% of non-parenchymal cells

This suggests that excessive GHK-Cu (or other copper peptides) might theoretically push skin MMP-1 concentrations beyond levels supporting healthy collagen production into ranges associated with collagen fragmentation and breakdown seen in older skin with naturally elevated MMP-1

It is: This matters because safety begins in formulation and manufacturing

Gold-based drugs are sometimes used in the treatment of rheumatoid arthritis, and can cause serious side-effects

While that argument addresses quality-control concerns associated with the gray market, it doesnt confront the fundamental question of whether peptides are safe