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Hyaluronic acid

4 products

Hyaluronic acid is a sugar molecule your body already makes, concentrated in skin, joints and eyes. In skincare it works as a humectant: it binds water and holds it in the upper layers of skin, which makes the surface look smoother and fuller. Formulas usually blend several molecular weights, and you will also see it as sodium hyaluronate, the salt form that dissolves more readily.The research here is unglamorous and well established. Topical hyaluronic acid measurably increases skin hydration and improves the appearance of fine surface lines that are really dehydration lines. What it does not do is rebuild collagen or permanently change skin structure; the effect lasts as long as you keep using it and keep it sealed in.Brand language often stretches this into deep filling, bounce and lasting plumpness, sometimes citing how many times its weight in water the molecule holds. That number is a laboratory property, not a promise about your face.It suits every skin type, which is why it appears in sunscreens, essences and serums alike. The one real caveat: in very dry air, a humectant with nothing layered over it can leave skin feeling tighter than before. Apply it to damp skin and follow with a moisturizer or cream. People who want texture, pigment or firmness work done should treat hyaluronic acid as support, not as the main active.It conflicts with essentially nothing. Hyaluronic acid buffers stronger partners like azelaic acid or vitamin C, and it sits happily under sunscreen. If a product stings, the acid is almost never the reason.Find it doing quiet work in the Hada Labo H.A. Supreme Vita Brightening Concentrate Serum and in the lightweight SKIN1004 Hyalu-Cica Water-Fit Sun Serum.