As for systemic oral bioavailability - whether enough of it crosses from the gut into circulation to affect other tissues - that has not been definitively established in published human research
For these, the question "does GHK-Cu need refrigeration" might have a different answer, depending on the specific product formulation and manufacturer's instructions
Collagen and bone broth , which support gum and thyroid health
Study: Oral cyanocobalamin with SNAC achieved 5.09% bioavailability vs
Lets face it, wed all like enhanced fat burning, better wound healing, smoother skin, better blood pressure, sexual energy, slowed aging, reversed bone loss