Hyaluronic Acid
Also known as: HA, Sodium Hyaluronate
What It Is
A naturally occurring polysaccharide found in the body that attracts and retains moisture.
What It Does
Draws water to the skin and helps lock it in, making skin appear plumper, smoother, and more hydrated.
Best For
Benefits
- Attracts up to 1,000x its weight in water
- Plumps the skin and softens fine lines
- Lightweight and non-greasy — suitable for all skin types
- Works well under moisturizers and serums
When to Be Careful
- In very dry climates, can pull moisture from the skin if not sealed with a moisturizer
- Must be applied to damp skin for best results
Hyaluronic acid is one of the most well-marketed skincare ingredients because the science is both real and easy to communicate. "Holds 1,000x its weight in water" is memorable and accurate. It democratized the concept of hydration-focused skincare.
People assume hyaluronic acid is moisturizing on its own. It's a humectant — it draws moisture — but if you apply it in a dry environment without sealing it with a moisturizer, it can actually draw moisture out of the skin rather than from the air.
After cleansing, before moisturizer. Apply to damp skin and seal immediately with a moisturizer for best results.
Everyone — especially dehydrated, dry, and normal skin types. Works under all other actives.
In very arid climates, skip the standalone HA serum and rely instead on moisturizers that contain HA already sealed within an occlusive formula.
Not really possible to overdo HA at standard skincare concentrations.