Ingredient review

Sodium Butyroyl Hyaluronate

INCI: SODIUM BUTYROYL HYALURONATE

A next-gen hyaluronic acid derivative that sticks to skin longer and penetrates deeper for lasting hydration.

beautyskincarehumectant

In plain English

Sodium Butyroyl Hyaluronate is a souped-up version of hyaluronic acid. Regular hyaluronic acid is great at holding water, but it can wash off easily and doesn't sink deep into skin. By attaching a tiny fatty chain (butyroyl group), this ingredient becomes stickier and more oil-friendly, so it stays on your skin longer and can reach deeper layers. It still pulls in moisture like the original, but with better staying power.

Review score

Safety, usefulness, and evidence

4.3Good

4.3/ 5

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

How reviews are scored

Quick decision guide

Easy yes for most routines

Sodium Butyroyl 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 Butyroyl 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A semi-synthetic derivative of hyaluronic acid, where a butyric acid (a short-chain fatty acid) is chemically attached to the hyaluronic acid molecule. This modification makes the molecule more lipophilic (oil-loving), allowing it to better interact with the skin's lipid barrier and penetrate more effectively than standard hyaluronic acid.

How it works

Once applied, Sodium Butyroyl Hyaluronate binds to the skin's surface and gradually releases moisture. The fatty chain helps it anchor into the lipid layers between skin cells, so it doesn't rinse away as easily. It also has a lower molecular weight than standard hyaluronic acid, which may allow it to reach deeper into the stratum corneum (the outermost skin layer) to hydrate from within.

Pros

Enhanced skin adhesion

The butyroyl group helps the molecule stick to the skin's lipid barrier, so it doesn't rinse off as quickly as standard hyaluronic acid, giving you longer-lasting hydration.

Deeper penetration potential

Its modified structure may allow it to reach deeper layers of the outer skin, providing moisture where it's needed most, not just on the surface.

Cons and cautions

Less research than standard HA

While promising, there are fewer peer-reviewed human studies on this derivative compared to the decades of research on regular hyaluronic acid.

Higher cost in products

Because it's a specialized derivative, products containing it tend to be pricier than those with standard hyaluronic acid.

Best for

Anyone looking for a more effective hyaluronic acid that stays put
People with dry or dehydrated skin who want lasting moisture

Use caution if

Those with a known allergy to hyaluronic acid or butyric acid derivatives (rare)

Usage tips

Apply to damp skin to help the ingredient draw in extra moisture.

Layer with a moisturizer containing occlusives (like shea butter or squalane) to seal in the hydration.

Safety summary

Sodium Butyroyl Hyaluronate is considered safe for topical use in cosmetics. It has low irritation and comedogenic potential, making it suitable for most skin types, including sensitive skin. As with any ingredient, patch test if you have a history of reactions to hyaluronic acid derivatives.

Research notes

Research is moderate but growing. Studies show improved skin retention and hydration compared to standard hyaluronic acid in vitro and in small human trials. Larger, long-term studies are still needed to fully confirm its superiority.

Common label clues

Typical concentration: 0.1% to 1%
Regulatory status: Approved for use in cosmetics in the EU, US, and other major markets. No specific restrictions beyond general cosmetic safety requirements.
Common uses: Serums, Moisturizers, Eye creams, Sheet masks
Environmental note: Produced via chemical modification of bio-fermented hyaluronic acid. The environmental impact is similar to other semi-synthetic humectants, with no known bioaccumulation concerns.

Good to know

This ingredient is often found in 'next-gen' or 'advanced' hyaluronic acid serums.
It is considered a humectant, meaning it attracts water from the environment and deeper skin layers to the surface.

Common questions

What is Sodium Butyroyl Hyaluronate in beauty products?

What does Sodium Butyroyl Hyaluronate do in a beauty product?

Is Sodium Butyroyl Hyaluronate safe for most people?

Who should be careful with Sodium Butyroyl Hyaluronate?

Those with a known allergy to hyaluronic acid or butyric acid derivatives (rare)

Research sources

Cosmetic Ingredient Review (CIR) - Hyaluronic Acid SafetyOpen PubMed - Modified Hyaluronic Acid for Skin DeliveryOpen INCI Decoder - Sodium Butyroyl HyaluronateOpen

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.