Description

A hyaluronic acid (HA) serum is a lightweight skin care product formulated with hyaluronic acid (or its salt form, sodium hyaluronate) to deliver deep hydration. Because HA is a humectant, it draws water into the skin, helping maintain moisture and plumpness.

Hyaluronic acid is naturally present in skin, joints, and connective tissues, but its levels decline with age and environmental stress. Topical HA helps replenish hydration at the surface level.