Ingredient review
Sodium Stearoyl Hyaluronate
INCI: Sodium Stearoyl Hyaluronate
A gentle, modified hyaluronic acid that sticks to skin longer than standard HA, offering deep hydration without irritation.
In plain English
Sodium Stearoyl Hyaluronate is a version of hyaluronic acid (a natural moisture-binding molecule) that has been chemically tweaked by adding a fatty acid chain. This makes it more compatible with the skin's outer layer, so it doesn't wash off as quickly and keeps delivering moisture for longer. It's like upgrading regular HA to a slow-release, stickier version that stays put on your face.
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 Stearoyl Hyaluronate 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 Stearoyl Hyaluronate.
- 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 semi-synthetic derivative of hyaluronic acid, where a stearic acid (a fatty acid) group is attached to the HA molecule. This modification increases its lipophilicity (fat-liking property), allowing it to better integrate into the skin's lipid barrier.
How it works
It forms a thin, water-loving film on the skin's surface that attracts and holds water molecules. Because of the fatty acid tail, it also interacts with the skin's natural oils, anchoring it more firmly and reducing transepidermal water loss (water evaporation from skin). This dual action provides both immediate and sustained hydration.
Pros
Longer-lasting hydration
The fatty acid modification helps the ingredient adhere to skin better than standard hyaluronic acid, so moisture stays locked in for hours.
Very gentle on skin
It has a low irritation and comedogenic risk, making it suitable even for sensitive or reactive skin types.
Cons and cautions
Can feel tacky
In higher concentrations or in certain formulations, it may leave a slightly sticky or tacky finish on the skin.
Less studied than standard HA
While promising, there is less independent research on this specific derivative compared to regular hyaluronic acid or sodium hyaluronate.
Best for
- Anyone looking for enhanced hydration that lasts longer than standard HA
- People with dry or dehydrated skin who want a gentle, non-irritating humectant
- Those with sensitive skin who react to other humectants
Use caution if
- Individuals with very oily or acne-prone skin may find it slightly heavy if used in rich formulations
Usage tips
Safety summary
Sodium Stearoyl Hyaluronate is considered safe for topical use in cosmetics. It has a low irritation and comedogenic profile, and no significant safety concerns have been reported in the available literature.
Research notes
Research on this specific derivative is limited compared to standard hyaluronic acid, but existing studies and formulation data support its efficacy as a humectant and skin-conditioning agent. Its modified structure offers theoretical advantages in skin adhesion and sustained hydration.
Common label clues
- Typical concentration
- 0.1% to 1%
- Regulatory status
- Approved as a cosmetic ingredient in the EU, US, and other major markets. No known restrictions.
- Common uses
- Serums, Moisturizers, Eye creams, Sheet masks
- Environmental note
- Produced via chemical modification of bio-fermented hyaluronic acid. Generally considered low environmental impact.
Good to know
- Sodium Stearoyl Hyaluronate is often found in 'multi-weight' HA serums that combine different molecular sizes for layered hydration.
- It is compatible with most other skincare ingredients, including vitamin C, retinol, and niacinamide.
Common questions
What is Sodium Stearoyl Hyaluronate in beauty products?
Sodium Stearoyl Hyaluronate is a version of hyaluronic acid (a natural moisture-binding molecule) that has been chemically tweaked by adding a fatty acid chain. This makes it more compatible with the skin's outer layer, so it doesn't wash off as quickly and keeps delivering moisture for longer. It's like upgrading regular HA to a slow-release, stickier version that stays put on your face.
What does Sodium Stearoyl Hyaluronate do in a beauty product?
It forms a thin, water-loving film on the skin's surface that attracts and holds water molecules. Because of the fatty acid tail, it also interacts with the skin's natural oils, anchoring it more firmly and reducing transepidermal water loss (water evaporation from skin). This dual action provides both immediate and sustained hydration.
Is Sodium Stearoyl Hyaluronate safe for most people?
Sodium Stearoyl Hyaluronate is considered safe for topical use in cosmetics. It has a low irritation and comedogenic profile, and no significant safety concerns have been reported in the available literature.
Who should be careful with Sodium Stearoyl Hyaluronate?
Individuals with very oily or acne-prone skin may find it slightly heavy if used in rich formulations
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.