This brightening and hydrating vitamin C serum delivers skin enhancing benefits to achieve improved skin texture and tone resulting in healthier looking skin. 20% vitamin C active complex formula supports healthy collagen production and protects against damaging free radicals and HEV (blue light).  Stabilized, controlled, time-released delivery system provides maximum penetration and absorption to guard against free radical damage, while supporting the absorption of other cosmetic treatments, including retinol.