They are operating on completely different principles
- Yellowing or amber color: Oxidation
In this area, copper peptides have better data than most cosmetic actives: a 2007 study found AHKCu promoted human hairfollicle growth and dermal papilla cell proliferation in cultured follicles, and a 2016 randomized trial of a GHKbased topical in men with AGA reported roughly 5272 additional hairs per cm after six months in the active groups [4]
It typically resolves on its own within a day or so
Always follow the storage line on the product label or patient leaflet, which is the definitive source for your specific vial
Other Ingredients Contains: Fish (anchovy, mackerel, sardine, pollack, whiting, or cod) and Soy