ghk-cu and vitamin c Copper Peptide, Face Serum, 1 oz (30 ml) GHK-Cu Skin Protocol: Topical Copper
Description
Having said this, its always good to be cautious when you start a new product, as you dont know for sure how your body will react

Immune Function Research published in Molecular Immunology (2011) demonstrated that glutathione enhances immune response by improving T-cell function, which is crucial for fighting infections and cancer

Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology
10.22203/ecm.v029a06 10 BhattaraiN.GunnJ.ZhangM
