Hyaluronic acid occurs naturally in the body; 1 gram can carry up to 1,000 times its weight in water. Understanding its benefits and how products differ helps you choose the right treatment.

Hyaluronic acid (also known as HA) occurs naturally in the dermis and connective tissue of the human body. It has exceptionally high moisturising capacity — every 1 gram can carry up to 1,000 times its weight in water — and is extremely low in irritation to the skin.
| Property | Cross-linked hyaluronic acid | Non-cross-linked hyaluronic acid |
|---|---|---|
| Molecular structure | Cross-linked structure; stable | Loose structure; readily broken down |
| Application | Filling hollows, contour shaping | Hydration and repair, superficial injection |
| Duration | 6 to 18 months or more | Several weeks to 1 month |
Hydration type: Neauvia Hydro Deluxe, Profhilo, Restylane Skinboosters, Juvéderm Volite and others.
Filler / contouring type: Juvéderm, Restylane longer-lasting treatments and others, used to fill hollows, improve wrinkles and shape contours.