SkinCeuticals Tripeptide-R Neck RepairA corrective treatment specifically formulated for the neck, Tripeptide R Neck Repair is designed to address early to advanced visible signs of neck aging. Combining a tri functional corrective technology with a hydrating delivery system, Tripeptide R Neck Repair fortifies skin's extracellular matrix and supports skin's resistance to visible neck aging. Formulated with 0. 2% pure, slow release retinol enhanced with 2. 5% tripeptide concentrate and 5.