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Sodium Hyaluronate Crosspolymer appears in the INCI list of many moisturizers. It is hyaluronic acid, but not in its usual form: the chains have been linked together to form a three-dimensional network. This makes a substantial difference to how it behaves.
Article written by Elisa Avalle, founder of LeLang Skin Care and dermocosmetics specialist. Cover image generated with the help of artificial intelligence.
What is crosslinked hyaluronic acid?
Crosslinking means creating chemical bonds between different chains, transforming independent molecules into a single mesh-like structure. In the case of hyaluronic acid, the result is a material that behaves like a molecular sponge: it absorbs water, swells, and holds it inside its own structure instead of merely binding it on the surface.
The same principle is behind injectable fillers, where crosslinking slows enzymatic breakdown and helps the results last. In cosmetics, the goal is different and the degree of crosslinking is much lower, but the underlying mechanism is the same.
This is where clarity is essential: a crosslinked cosmetic product stays on the surface, and its effect is reversible. The volume achieved through injections is a matter of aesthetic medicine, acts in the dermis, and has nothing to do with a cream.
How it differs from regular hyaluronic acid
The linear form - classic hyaluronic acid or sodium hyaluronate - forms a thin film that holds onto water but dries relatively quickly and is sensitive to the ambient humidity.
The crosslinked form holds onto more water for longer because its mesh structure traps it mechanically. It stands up better to dry air and is more stable over time, because crosslinking also slows the action of hyaluronidases, the enzymes that break down hyaluronic acid.
There’s also an immediate optical effect: as it dries, the crosslinked film exerts slight tension on the surface, making fine wrinkles less visible. This is a real effect, but temporary and superficial: it lasts as long as the film remains and goes away with cleansing.
How to use it and where to find it
The same rule applies as for all humectants: apply to slightly damp skin and cover with a cream or oil. The crosslinked form is more tolerant of dry environments than the linear form, but it’s not immune.
In the most effective formulas, the two forms coexist because they work over different time frames: linear forms of varying molecular weights for widespread hydration, and the crosslinked form for surface staying power. In our ferulic acid serum, the crosslinked form is paired with sodium hyaluronate and vitamin C.
FERULIC + HA SERUM Vitamin C and ferulic acid face serum Antioxidant and tone-evening, with dual hyaluronic acid. Helps prevent dark sp... Discover FERULIC + HA SERUM
In Hyaluron 8 Hydra Deep, the crosslinked form creates a three-dimensional network on the skin’s surface and works alongside seven other forms of hyaluronic acid, from the heavier ones, which hold water on the surface, to the lighter ones.
HYALURON 8 HYDRA DEEP Face serum with 8 forms of hyaluronic acid, hydrating and plumping 8 forms of hyaluronic acid with different molecul... Discover HYALURON 8 HYDRA DEEP
Frequently asked questions about crosslinked hyaluronic acid
Does a cream with crosslinked hyaluronic acid add volume like a filler?
No. Fillers are injected into the dermis; cream stays on top of the epidermis. They’re two different things, and no cosmetic product can replicate the effect of an injection.
Is it better than the regular kind?
It’s different. It holds water on the surface for longer, but doesn’t reach the layers that shorter chains can. The best formulas use them together.
Can it cause that tight-skin feeling?
As it dries, the crosslinked film can create a slight feeling of tightness. It’s not dryness: it’s the film contracting, and it goes away when you apply a cream on top.
Is it suitable for oily skin?
Yes, it’s water-soluble and contains no lipids. For very oily skin, a gel texture is preferable to a rich cream.
How can I recognize it on the label?
How can you tell it’s Sodium Hyaluronate Crosspolymer? If you only see Sodium Hyaluronate or Hyaluronic Acid, it’s the linear form.
