Why you need it: The Ordinary Hyaluronic Acid 2% + B5 contains three different forms of Hyaluronic Acid so that it penetrates deeper into the skin to give you maximum hydrating benefits. Hyaluronic Acid can attract up to 1,000 times its weight in water and retains this moisture in the skin. It hydrates and plumps skin, combating dehydration which can cause dullness, flaking, fine lines and a tight, uncomfortable feeling. The formula also contains Vitamin B5 which has humectant (moisture-attracting) properties and works to increase surface hydration of the skin while it heals and regenerates skin, making it a great treatment for skin that’s dray, rough or flaky. Skin type: All skin types.