Ingredient review
Sodium Hyaluronate Crosspolymer-3
INCI: SODIUM HYALURONATE CROSSPOLYMER-3
A next-generation hyaluronic acid that sits on the skin's surface to form a long-lasting moisture barrier without feeling sticky.
In plain English
Sodium Hyaluronate Crosspolymer-3 is a modified version of hyaluronic acid, a substance your skin naturally produces to hold water. The 'crosspolymer' part means the molecules are linked together into a larger network, so instead of sinking deep into skin, it stays on the surface and creates a flexible, breathable film that locks in moisture for hours. It's like upgrading from a quick splash of water to a slow-release hydration blanket.
Review score
Safety, usefulness, and evidence
Strong fit for many routines
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Easy yes for most routines
Sodium Hyaluronate Crosspolymer-3 is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Sodium Hyaluronate Crosspolymer-3.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A chemically modified, crosslinked form of sodium hyaluronate (the salt form of hyaluronic acid). The crosslinking process bonds individual hyaluronic acid chains into a larger, more stable polymer network that resists breakdown and stays on the skin surface longer than standard hyaluronic acid.
How it works
When applied to skin, the crosspolymer forms a thin, invisible film that physically holds water molecules. Because the molecules are too large to penetrate deeply, they remain on the stratum corneum (the outermost skin layer) where they continuously attract moisture from the air and from deeper skin layers, reducing water loss (transepidermal water loss, or TEWL). The film also smooths the skin's surface temporarily, giving a plumping effect.
Pros
Superior surface hydration
The crosslinked structure holds more water than standard hyaluronic acid and releases it slowly, keeping skin hydrated for longer periods without reapplication.
Gentle and non-irritating
Because it stays on the surface and doesn't penetrate deeply, it's very unlikely to cause irritation, making it suitable for sensitive or compromised skin barriers.
Cons and cautions
Can feel tacky in heavy layers
If you apply too much product or layer multiple humectants, the film can feel slightly sticky or tacky, which some people find uncomfortable.
Dependent on environmental humidity
In very dry air (below 30% humidity), the crosspolymer may pull moisture from deeper skin layers instead of the air, potentially worsening dehydration if not sealed with an occlusive.
Best for
- People with dry or dehydrated skin looking for a non-greasy moisture boost
- Anyone wanting a plumping effect without invasive treatments
Use caution if
- Those who prefer lightweight, fast-absorbing textures and dislike any film-like feel
Usage tips
Safety summary
Sodium Hyaluronate Crosspolymer-3 is considered very safe for topical use. It is non-irritating, non-sensitizing, and non-comedogenic. The crosslinked structure reduces the risk of systemic absorption, and no significant adverse effects have been reported in cosmetic use.
Research notes
Research on crosspolymer forms of hyaluronic acid is less extensive than on standard hyaluronic acid, but available studies show they provide superior surface hydration and barrier function compared to non-crosslinked versions. Most evidence comes from in vitro and clinical studies on similar crosspolymers, with consistent results supporting their humectant and film-forming benefits.
Common label clues
- Typical concentration
- 0.1% to 1%
- Regulatory status
- Approved for use in cosmetics globally, including by the U.S. FDA and the European Commission. No known restrictions at typical use levels.
- Common uses
- Serums, Moisturizers, Eye creams, Sheet masks
- Environmental note
- Produced via fermentation of plant-based sugars (biotech process), making it a more sustainable alternative to animal-derived hyaluronic acid. Biodegradable in typical environmental conditions.
Good to know
- Sodium Hyaluronate Crosspolymer-3 is often listed near the end of ingredient lists because it's effective at low concentrations.
- It pairs well with other humectants like glycerin and can be used in both AM and PM routines.
Common questions
What is Sodium Hyaluronate Crosspolymer-3 in beauty products?
Sodium Hyaluronate Crosspolymer-3 is a modified version of hyaluronic acid, a substance your skin naturally produces to hold water. The 'crosspolymer' part means the molecules are linked together into a larger network, so instead of sinking deep into skin, it stays on the surface and creates a flexible, breathable film that locks in moisture for hours. It's like upgrading from a quick splash of water to a slow-release hydration blanket.
What does Sodium Hyaluronate Crosspolymer-3 do in a beauty product?
When applied to skin, the crosspolymer forms a thin, invisible film that physically holds water molecules. Because the molecules are too large to penetrate deeply, they remain on the stratum corneum (the outermost skin layer) where they continuously attract moisture from the air and from deeper skin layers, reducing water loss (transepidermal water loss, or TEWL). The film also smooths the skin's surface temporarily, giving a plumping effect.
Is Sodium Hyaluronate Crosspolymer-3 safe for most people?
Sodium Hyaluronate Crosspolymer-3 is considered very safe for topical use. It is non-irritating, non-sensitizing, and non-comedogenic. The crosslinked structure reduces the risk of systemic absorption, and no significant adverse effects have been reported in cosmetic use.
Who should be careful with Sodium Hyaluronate Crosspolymer-3?
Those who prefer lightweight, fast-absorbing textures and dislike any film-like feel
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.