What Hyaluronic Acid Serums Do
Hyaluronic acid is a naturally occurring sugar molecule that attracts water. In serums, it aims to increase hydration in the outer skin layers, which can temporarily improve the appearance of plumpness and reduce the visibility of fine lines.
Do They Work
Clinical studies show that topical hyaluronic acid can improve skin hydration and smoothness, especially in dry environments. Effectiveness depends on molecular weight, formulation, and skin type. Lower-weight molecules may penetrate more deeply, while higher-weight molecules sit on the surface.
How to Use Them
Apply a hyaluronic acid serum to damp skin to help it draw in moisture. Follow with a moisturizer or occlusive to lock hydration in. Results are usually temporary and require consistent use. For more details on formulation and evidence, visit this overview.
