- Featuring three types of hyaluronic acid (at low, medium, and high molecular weights) this lightweight serum offers serious skin smoothing – at a surprisingly small price. Penetrating the skin to reach its deeper layers, O- Hyaluronic Acid 2% + B5 delivers lasting hydration and offers visible plumping and moisture retention so that skin looks smoother, softer, and healthier. The hyaluronic acid at the center of this super serum attracts up to 1000 times its weight in water, while a brilliant boost of vitamin B5 heals dry and damaged areas by stabilizing the skin’s barrier function and promoting the growth of stronger tissue-VP