Best For Skin Types
All, Dry, Sensitive, Mature
Addresses
Usage Frequency
Daily
What Is Sodium Carboxymethyl Hyaluronate?
Sodium carboxymethyl hyaluronate is a derivative of hyaluronic acid, a naturally occurring polysaccharide found in the skin. It is created by chemically modifying hyaluronic acid to improve its stability and performance in cosmetic formulations. This modified version retains the hydrating properties of its parent ingredient whilst offering enhanced solubility and consistency in skincare products.
As a humectant, it draws moisture from the environment and deeper skin layers to the surface, helping to plump the epidermis and improve hydration levels. It also functions as a skin conditioning agent, contributing to a smoother, more supple skin feel.
How It Works
Sodium carboxymethyl hyaluronate works primarily as a humectant, meaning it has a strong affinity for water molecules. When applied to the skin, it absorbs moisture from the air and from deeper layers of the epidermis, drawing it towards the surface. This increases hydration levels in the stratum corneum (the outermost layer of skin), which can temporarily improve skin texture and firmness.
The ingredient also forms a lightweight conditioning film on the skin, enhancing its feel and appearance without a heavy residue. Early-stage research suggests that compounds in this structural family may offer some antioxidant benefits, though this aspect requires further investigation in the context of topical skincare use.
Clinical Evidence & References
The hydrating efficacy of hyaluronic acid and its derivatives is well-established in skincare research. Sodium carboxymethyl hyaluronate inherits these properties through its chemical relationship to standard hyaluronic acid, though direct comparative studies on this specific variant are limited in published literature.
Emerging research indicates that modified hyaluronic acid compounds and related polysaccharides may contribute to reducing oxidative stress and inflammatory markers in skin exposed to environmental stressors. However, the evidence base for sodium carboxymethyl hyaluronate specifically is still developing, and further clinical studies would help clarify its precise benefits in topical formulations.
Published Research
How to Use
This ingredient is typically used in serums, hydrating toners, and moisturisers. It is best applied to damp skin, as it works more effectively when there is moisture present for it to bind to. It can be layered beneath other actives and is generally compatible with most skincare routines. For optimal hydration benefits, follow with an occlusive moisturiser to seal in the hydration it provides.
Safety & Precautions
Frequently Asked Questions
From the Clinic
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Sodium Acetylated Hyaluronate
Modified hyaluronic acid with enhanced skin retention
Sodium Ascorbyl Glucoside
A stable vitamin C derivative that hydrates and conditions skin
Sodium Butyroyl Hyaluronate
A modified form of hyaluronic acid designed for deeper skin penetration and sustained hydration
Sodium Dilauramidoglutamide Lysine
Plant-derived ingredient | Functions as a surfactant and emulsifier
Sodium Hyaluronate
Skin-identical humectant for deep, lasting hydration
Sodium Hyaluronate Crosspolymer
Cross-linked HA for extended surface hydration
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