Highly concentrated solutions of Tripeptide-1 (Copper Tripeptide) or a large vat of Tripeptide-1 (Copper Tripeptide) will appear blue. However, highly concentrated Tripeptide-1 (Copper Tripeptide) is harmful if placed on the skin. For cosmetic use, Tripeptide-1 (Copper Tripeptide) is provided in a dilute aqueous (water based) solution that appears clear in small amounts. It is also mixed with other active ingredients in Youth Serum.