Hyaluronic Acid
What it does
Hyaluronic acid is a humectant — an ingredient that attracts and holds water. Applied to skin, it boosts surface hydration and gives a plumper, smoother, more supple look. It is naturally present in the body, and the versions used in skincare (including sodium hyaluronate) are well tolerated.
What to know
Hyaluronic acid suits nearly every skin type, including oily and sensitive. One practical tip: because it pulls in moisture, it works best on slightly damp skin and sealed with a moisturizer on top, especially in dry climates, so it draws water into the skin rather than out of it.
Commonly found in
Serums, essences, moisturizers, and sheet masks.
Quick answers
Frequently asked questions
What does hyaluronic acid do?
It is a humectant, meaning it draws in and holds water. That boosts hydration and gives skin a plumper, smoother look.
Is hyaluronic acid good for all skin types?
Generally yes. It is lightweight and well tolerated, from oily to dry skin. In very dry air it works best applied to damp skin and sealed with a moisturizer.
What is sodium hyaluronate?
It is a form of hyaluronic acid with a smaller molecular size, often used because it is stable and absorbs well. You will see it on many labels.
Evidence
Last updated: August 5, 2026