Soften the appearance of fine lines and wrinkles, and visibly brighten your complexion with Medik8's original retinol serum. Formulated with 0.3% retinol, Retinol 3TR is designed to work alongside the nightly regenerative cycle to leave the skin visibly smooth, radiant and noticeably rejuvenated. Plus, it features Medik8's unique Time Release technology for retinol power that's released gradually throughout the night for effective results alongside minimal irritation.