Plump up the complexion with The Ordinary Hyaluronic Acid 2% + B5, a hydration serum designed to promote a smoother, more youthful complexion. Providing skincare to deliver instant hydration, this serum features five forms of hyaluronic acid, a humectant found naturally in the skin. With low, medium and high molecular weight as well as a hyaluronic acid crosspolymer and hydrolysed hyaluronic acid, it helps the skin retain moisture for all-day hydration.