Once GHK-Cu crosses out of the subcutaneous fat and into circulation, it travels everywhere blood goes, so the region you picked stops mattering within minutes
J Exp Med 213:22812291 Yu Q, Han Y, Wang X, Qin C, Zhai D, Yi Z, Chang J, Xiao Y, Wu C (2018) Copper silicate hollow microspheres-incorporated scaffolds for chemo-photothermal therapy of melanoma and tissue healing
They may make you wonder why do B12 shots hurt so bad
Oral GHK-Cu is more convenient but faces significant absorption challenges due to enzymatic degradation in the digestive tract
Concentration (mcg/mL) = Total peptide in vial (mcg) BAC water added (mL) Dose volume (mL) = Target dose (mcg) Concentration (mcg/mL) Syringe units = Dose volume (mL) 100 (for U-100 insulin syringes) Example: 10 mg BPC-157 vial + 2 mL bacteriostatic water 10,000 mcg 2 mL = 5,000 mcg/mL concentration For a 500 mcg dose: 500 5,000 = 0.10 mL 0.10 mL 100 = 10 units on a U-100 syringe Reconstitution Verification Checklist Vial peptide content confirmed (check label mg, not mcg) BAC water volume matches the target concentration for the protocol being referenced
Accordingly, no treatment effects on fat, carbohydrate, or protein oxidation rates were observed (Supplementary Table 4)