A widely used moisture-binding humectant and the sodium salt form of Hyaluronic Acid. Sodium Hyaluronate is valued in skincare for its water-holding capacity and compatibility with most formulations. It is available in a range of molecular weights, and its actual skin penetration depends on the specific MW used in each product — not simply on being a sodium salt.
Sodium Hyaluronate (INCI: Sodium Hyaluronate, CAS 9067-32-7) is the sodium salt form of Hyaluronic Acid, a naturally occurring glycosaminoglycan found in connective tissues throughout the body. It works as a humectant — drawing moisture from the surrounding environment into the skin — and is valued for its water-holding capacity. The CIR Expert Panel assessed Hyaluronic Acid, Potassium Hyaluronate, and Sodium Hyaluronate together and concluded they are safe as used in cosmetics (2009, updated 2023).
A common misconception is that Sodium Hyaluronate is inherently "smaller" than Hyaluronic Acid. In reality, both can be manufactured across a wide range of molecular weights. What primarily determines skin penetration depth is the actual MW of the product, not whether it is the acid or sodium salt form. CIR data shows that lower MW hyaluronates (e.g. 20–50 kDa) can reach deeper into the epidermis, while higher MW variants (e.g. >1000 kDa) tend to remain at the stratum corneum. The CIR summary also notes that, as a group, these ingredients are generally not expected to have significant percutaneous absorption due to their large molecular size.
Sodium Hyaluronate is produced through bacterial fermentation or extracted from rooster combs, then converted to the sodium salt form to improve water solubility. According to the 2023 CIR update, it was reported in 4,713 cosmetic formulations (4,317 leave-on and 394 rinse-off) — primarily serums, moisturizers, and toners. At cosmetic concentrations, it is generally non-irritating and well-tolerated, though individual responses can vary depending on the overall formulation, concentration, and preservative system.
The depth of hydration depends on the molecular weight used in a given product. Lower MW variants can reach deeper into the epidermis, while higher MW variants hydrate the skin surface. Many formulations blend different MW sizes to target multiple layers. Hyaluronic acid and its salts are known for high water-binding capacity, helping to maintain skin moisture and reduce the appearance of fine lines.
By pulling water into the skin and sealing it in, Sodium Hyaluronate strengthens the skin's moisture barrier and reduces trans-epidermal water loss (TEWL). This protection is especially valuable for dehydrated, sensitive, or reactive skin exposed to harsh environmental conditions.
The immediate hydration boost from Sodium Hyaluronate creates a visible plumping effect within minutes, reducing the appearance of fine lines and wrinkles. With consistent use, it improves skin elasticity, firmness, and luminosity — essential for a youthful, dewy complexion.
Sodium Hyaluronate is commonly used as a hydrating base layer before other actives. By improving skin hydration, it can create a more comfortable application experience for subsequent products. It pairs well with most actives and is unlikely to interfere with other ingredients in a routine.
Generally suitable for: Most skin types, including dehydrated, mature, sensitive, and acne-prone skin. Individual tolerance depends on the overall formulation, concentration, and preservative system.
The CIR Expert Panel concluded that Sodium Hyaluronate is safe as used in cosmetics. Tested for genotoxicity (Ames, micronucleus), carcinogenicity, and immunogenicity — all findings were negative or showed no adverse effects. It is one of the most widely used humectants in skincare, with a long track record of consumer use supporting its safety profile.
Humectant-type ingredients like Sodium Hyaluronate perform best when there is moisture available to draw upon. In practice, applying to slightly damp skin and following with a moisturizer or occlusive helps ensure stable hydration. In low-humidity environments, using a humectant alone — without an occlusive layer — may feel less effective, as the humectant has less ambient moisture to work with. Pairing with an emollient or occlusive is standard practice.
The molecular weight of Sodium Hyaluronate varies by product. Lower MW variants can reach deeper into the epidermis; higher MW variants tend to remain at the surface with a plumping, film-forming effect. Many products blend multiple MW sizes. Most products do not disclose the exact MW on the label.
At cosmetic concentrations, Sodium Hyaluronate is generally non-irritating and well-tolerated, though as with any ingredient, individual responses may vary depending on the full formulation and one's own skin condition.
Sodium Hyaluronate is the sodium salt of hyaluronic acid, a substance naturally present in connective tissues including skin, joints, and eyes. The CIR assessment found no genotoxicity, carcinogenicity, or reproductive/developmental toxicity. As a topical cosmetic ingredient with limited percutaneous absorption, it is generally considered a low-risk option during pregnancy and nursing. However, no large-scale clinical trials have specifically studied pregnant populations. Consult your healthcare provider for personal advice, especially if combining with other active ingredients or using medical-grade products.
Two humectants that complement each other — Glycerin provides broad, stable hydration while Sodium Hyaluronate adds water-binding capacity. Together they support hydration across multiple skin layers.
Sodium Hyaluronate hydrates and buffers the slight irritation some people experience from Vitamin C, improving tolerability. Apply Sodium Hyaluronate first, then Vitamin C, for optimal results.
The hydration from Sodium Hyaluronate significantly reduces dryness and irritation from retinol. Apply Sodium Hyaluronate to damp skin first, then your Retinol serum, for a gentle, effective anti-aging routine.
Niacinamide strengthens the skin barrier while Sodium Hyaluronate provides deep hydration. Together they address barrier weakness and moisture deficiency — ideal for sensitive or compromised skin.
Sodium Hyaluronate is water-based and may not layer well under heavy oils. If combining with oils, apply Sodium Hyaluronate first on damp skin, allow it to absorb, then apply oil-based products to seal.
Sodium Hyaluronate pairs fine with AHA and BHA exfoliants — the hydration actually reduces irritation. However, in very dry skin types, use exfoliants only 1–2× weekly and always follow with Sodium Hyaluronate for recovery.
In low-humidity environments, using a humectant alone without an occlusive may feel less effective. Pairing with a heavier moisturizer or occlusive helps lock in hydration and ensures more consistent results.
Featured products containing Sodium Hyaluronate. Total product variants: 13,363
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