01
What is it?
Hyaluronic acid is a glycosaminoglycan found naturally in the skin. In cosmetics it acts primarily as a humectant, attracting and helping to retain water in the uppermost layers. It may appear in an INCI list as hyaluronic acid, sodium hyaluronate or in hydrolysed forms, among others. Different molecular weights influence texture, film formation and formula behaviour; topical application is not equivalent to an injectable filler.
02
Its role in a formula
Its water-binding action can make the surface look temporarily smoother, more supple and radiant while easing the feeling of tightness. It does not replace the lipids or emollients in a moisturiser, which is why it often works best in a complete formula or followed by a cream that helps limit water loss. It can be useful for dehydrated skin, including combination or oily skin types.
03
Compatibility and tolerance
It generally pairs well with vitamin C, peptides, niacinamide and other actives because its role is primarily hydrating. Hyaluronic acid itself has no broad ingredient conflicts; tolerance depends on the complete formula. In very dry conditions, applying it to slightly damp skin and following with a moisturiser may feel more comfortable.
04
How do I use it?
It can be used in the morning, evening or both. Apply a small amount after cleansing and before richer textures. Follow with moisturiser if your skin needs it and finish with sun protection during the day. If the products pill or leave residue, use less and allow a few seconds between layers.