Wellness peptide craze: why people are injecting drugs 'not for human consumption' Subcutaneous Injection Sites and Instructions for Safe Self Administration GHK cu hard spots at injection site : r Peptides Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule Uses and Benefits #ghk GHK Cu is a naturally occurring peptide in human plasma that declines with age. When used in injections (usually subcutaneous), it can offer various benefits: Skin Rejuvenation and Anti Aging: GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia