Pure · CHighly stable and potent Vitamin C, gentle and non drying THD (Tetrahexyldecyl Ascorbate), provides greater penetration into Keratinocytes and greater collagen production than Ascorbic Acid. Helps combat sun induced skin damage, as well as improve skin texture and tone. PROFESSIONAL USE Apply even layer under all ClearChoice peels. INGREDIENTS Pharmaceutical Grade High Potency, Pure Vitamin C Tetrahexdecyl Ascorbate.