EIGHTH DAY Regenerative Serum deeply renews skin with its patented, peptide-rich formula. Developed by Dr. Antony Nakhla, this serum contains 24 potent bioidentical actives that stimulate the skin’s innate ability to restore and regenerate. It clinically addresses 10 visible signs of aging, visibly improving firmness, elasticity, and reducing fine lines for a more youthful complexion.