Humectant

Sodium Hyaluronate Crosspolymer-3

INCI: SODIUM HYALURONATE CROSSPOLYMER-3

Reviewed by Rosie · Last updated 2 Jun 2026

A modified form of hyaluronic acid designed for sustained hydration and skin conditioning

Best For Skin Types

All, Dry, Sensitive, Mature

Addresses

Dryness, Hydration, Fine lines

Usage Frequency

Daily

What Is Sodium Hyaluronate Crosspolymer-3?

Sodium Hyaluronate Crosspolymer-3 is a chemically modified version of hyaluronic acid, a naturally occurring molecule found throughout the skin's structure. The crosslinked form creates a larger, more stable molecular network compared to standard hyaluronic acid, which may alter how it behaves on and in the skin.

As a humectant and skin conditioning agent, this ingredient draws moisture into the skin and helps maintain hydration levels. It functions similarly to its parent compound but with structural modifications that aim to improve stability and potentially extend its conditioning effects.

How It Works

Hyaluronic acid and its derivatives work by binding water molecules and drawing them into the outer layers of skin, a process known as humectancy. The crosslinked structure of this particular form may create a larger molecular barrier on the skin's surface, potentially offering different water-retention properties than smaller HA molecules.

The ingredient is also recognised for skin conditioning properties, helping to maintain suppleness and hydration. Because it exists naturally in skin's extracellular matrix, it integrates well with the skin's own moisture-retention systems.

Clinical Evidence & References

Hyaluronic acid itself is well-established for improving skin hydration and has been extensively studied in both topical and injectable forms. Research confirms its role as a humectant and its benefits for skin barrier function and moisture retention.

However, specific clinical evidence for the crosspolymer-3 variant is limited in published literature. The crosslinking modification is intended to improve performance, but direct comparisons with standard hyaluronic acid in clinical settings are not widely documented. General HA benefits are likely applicable, though the magnitude of any additional advantage from the crosslinked structure remains unclear.

How to Use

Sodium Hyaluronate Crosspolymer-3 is typically found in serums, moisturisers, and hydrating treatments. For best results, apply to damp or slightly moist skin to maximise water absorption, then follow with an occlusive moisturiser to seal in hydration. It can be layered with other hydrating or conditioning ingredients without significant compatibility concerns.

Safety & Precautions

Sodium Hyaluronate Crosspolymer-3 is generally well-tolerated and carries a low risk of irritation or allergic reaction. It is suitable for sensitive skin types and is unlikely to cause adverse effects at typical cosmetic concentrations.

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