When people start looking into supplementation, the big question shows up fast
B12 is a water-soluble vitamin with a key role in the normal functioning of the brain and nervous system, and for the formation of blood
It stimulates collagen and elastin production, improving skin firmness, reducing wrinkles, and enhancing would healing
The Nature Scientific Reports 2016 study confirmed that GHK-Cu produced no cytotoxicity to human keratinocytes at concentrations up to 5,800 micromolar over 72 hours and did not induce inflammatory biomarkers
Thus, sterile water for injection (or saline without preservative, depending on instructions) would be used for dissolving drugs given by these routes
A half-inch needle will land comfortably in the subcutaneous layer