[Dr.G] Doopi Lab Core Peptide Volume Shampoo 500g[Dr. G] Doopi Lab Core Peptide Volume Shampoo 500g This hair treatment contains Core Peptide to strengthen weakened scalp and hair roots for healthy and voluminous hair. Rich foam cleanses the scalp impurities perfectly and leaves the hair soft and healthy. How to Use Massage a moderate amount into wet hair and scalp. Lather well and rinse thoroughly.