ghk-cu copper peptide mechanisms for hair growth scientific evidence GHK Clinical Trial (2016) — Research Summary GHK-Cu peptide for hair: the

A 10mg vial becomes more economical at higher doses (1.0mg and above) where weekly consumption increases significantly

What's missing: No human pharmacokinetic data No human safety data No optimal dose for humans (mouse 20mg/kg = ~150mg in a 75kg human if dose-equivalent, but mouse-to-human scaling for small molecules is unreliable) No drug interaction data No long-term safety data Buyers in this category are doing biohacker-tier self-experimentation with limited data

At 2,500 mcg/mL, that dose is 0.1 mL, which equals 10 units on a U-100 syringe

The preservative should be effective at your formulation pH and should not interact negatively with the peptide

It clears out of your blood in under thirty minutes yet people claim effects that last for days