ghk-cu injection sites subcutaneous where to inject ghk cu for face and Instructions for Safe Self-Administration 5 GHK Cu Peptide Injection
Description
For most facial serums, moisturizers, and hair tonics, a concentration of 1% to 3% is the sweet spot

That means you have to get it from food or supplements
Quantification of thick collagen fibers were performed using ten high power fields per case

Concentrations for hair serums are typically similar to those for skin, ranging from 1.5% to 3%
