Hyaluronic Acid (Topical)

What is hyaluronic acid and what does it do?

Hyaluronic acid is a sugar molecule found naturally in skin, where it binds large amounts of water. Applied topically, it acts as a humectant, drawing water into the outer layer and making skin feel smoother and look plumper for a period of time. High-molecular-weight forms sit on the surface and reduce water loss; lower-molecular-weight or hydrolysed forms penetrate somewhat further. Topical hyaluronic acid does not reach the depth or provide the structure of injected filler, and it does not stimulate collagen in the way retinoids or procedures can. In very dry conditions, applying it to damp skin and sealing with moisturiser helps. [1]

What does the evidence show?

A review of clinical studies found topical hyaluronic acid improved hydration and the appearance of fine lines and elasticity in several trials, but most were small, short and sponsored, and many tested multi-ingredient products. Hydration benefits are consistent and well understood. Claims of significant wrinkle reduction from topical use alone should be treated with caution, as surface hydration effects fade within hours to days of stopping.

Who should avoid hyaluronic acid?

Topical hyaluronic acid is suitable for almost all skin types, including sensitive and acne-prone skin, and is safe to use in pregnancy as far as is known. Rarely, people react to other ingredients in the formula. Anyone with persistent irritation should stop and check the full ingredient list.

Is hyaluronic acid available in Singapore?

Topical hyaluronic acid is a common cosmetic ingredient and widely available in Singapore. Injectable hyaluronic acid fillers and skin boosters are different products, regulated as medical devices and administered by doctors. Topical serums should not be confused with injectables in strength, purpose or results.

If a dark patch, breakout or irritation is not responding to what you are using, the next step is a diagnosis rather than another product. See the Skin A–Z library for related ingredients.