10.1177/09603271221128739 137 ZhangY.BhavnaniB
But for most purposes (like weekly maintenance injections), IM is the preferred route at home because its simpler (the vitamins absorb quickly from muscle into the bloodstream over a few hours)
Advanced GHK-Cu face serum for wrinkles, fine lines, firmness, pores, redness, uneven tone, blemishes and hydration, with niacinamide and hyaluronic acid
Published evidence is narrower: topical skin and wound studies exist, hair claims are more indirect, and FDA materials caution that injectable GHK-Cu has limited human safety data [2], [3], [8]
It increases collagen, elastin, and glycosaminoglycans and supports dermal fibroblasts (skin cells in the dermis)