1. Copper peptide
This ingredient has an impressive clinical pedigree as it has been proven to induce scar reduction and encourage hair growth. It can be found in a lot of scar creams and has been on the market for over 20 years. Naturally, copper peptides exist in the body’s tissues, but it can be depleted due to degenerative diseases. This ingredient also promotes the production of elastin and collagen from scar tissue.