ghk-cu before and after Ghk cu GHK-Cu 6 week before and
Description
The result is a mixture of deoxyribonucleotide chains with molecular weights ranging from 50 to 1,500 kilodaltons

And thats the old school way to approach things

On a 0.3 mL syringe, 12 units sits on a clearly marked line with half-unit precision available
Collagen and fibroblast activity: In animal studies, BPC-157 has been associated with altered fibroblast activity and collagen deposition patterns