Ingredient review
Linoleyl Gallate
INCI: Linoleyl Gallate
A promising antioxidant that pairs fatty acid benefits with polyphenol protection, but research is still early and products are rare.
In plain English
Linoleyl Gallate is a lab-made molecule that combines a fatty acid (linoleic acid, found in many plant oils) with a plant antioxidant (gallic acid, found in green tea and berries). This pairing helps the antioxidant stick to skin better and work longer. It may help calm irritation, protect against pollution and UV damage, and support the skin's natural moisture barrier. Because it's relatively new in cosmetics, you won't find it in many products yet, and most evidence comes from lab studies rather than human trials.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is still emerging, so marketing claims deserve extra caution.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- semi synthetic
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Linoleyl Gallate 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 Linoleyl Gallate.
- 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
emergingThe ingredient may be promising, but claims should be treated more cautiously.
What it is
A semi-synthetic ester formed by linking linoleic acid (an omega-6 fatty acid) with gallic acid (a polyphenol antioxidant). This structure is designed to improve the stability and skin penetration of gallic acid while adding the moisturizing and barrier-supporting properties of linoleic acid.
How it works
Once applied, Linoleyl Gallate is thought to release both components gradually. The gallic acid portion scavenges free radicals and may reduce inflammation, while the linoleic acid part helps replenish skin lipids and strengthen the moisture barrier. The ester form may also help the molecule penetrate deeper into the skin compared to using gallic acid alone.
Pros
Dual-action molecule
Combines antioxidant power with a skin-identical fatty acid, potentially offering both protection and barrier support in one ingredient.
Gentle profile
Early safety data suggests low irritation and comedogenic risk, making it suitable for sensitive or acne-prone skin types.
Cons and cautions
Limited real-world evidence
Most research is preclinical; without robust human trials, it's hard to confirm how much benefit you'll actually see from a typical product.
Scarce in products
Because it's a newer ingredient, you'll find it in very few formulations, and those that exist may be from niche or expensive brands.
Best for
- People looking for a multi-tasking antioxidant that also supports barrier health
- Those with dry or sensitive skin who want gentle protection without harsh actives
Use caution if
- Anyone with a known allergy to gallic acid or linoleic acid sources (rare)
Usage tips
Safety summary
Available data indicates low irritation and sensitization potential, but long-term human safety studies are lacking. As with any new ingredient, patch test before regular use.
Research notes
Preclinical studies show antioxidant and anti-inflammatory activity, with improved stability over gallic acid alone. Human clinical data is minimal, so efficacy claims should be viewed with caution.
Common label clues
- Typical concentration
- Typically used at 0.1% to 1% in leave-on products
- Regulatory status
- Approved for cosmetic use in most regions including the EU and US, but not specifically reviewed by the Cosmetic Ingredient Review (CIR) panel as of 2025.
- Common uses
- Anti-aging serums, Barrier repair creams, Protective moisturizers
- Environmental note
- Synthesized from plant-derived fatty acids and polyphenols; no known significant environmental concerns at typical usage levels.
Good to know
- Linoleyl Gallate is sometimes listed under alternative names like 'Linoleyl 3,4,5-trihydroxybenzoate' on ingredient labels.
- It is not the same as 'Linoleic Acid' or 'Gallic Acid' alone — the ester form has different properties.
Common questions
What is Linoleyl Gallate in beauty products?
Linoleyl Gallate is a lab-made molecule that combines a fatty acid (linoleic acid, found in many plant oils) with a plant antioxidant (gallic acid, found in green tea and berries). This pairing helps the antioxidant stick to skin better and work longer. It may help calm irritation, protect against pollution and UV damage, and support the skin's natural moisture barrier. Because it's relatively new in cosmetics, you won't find it in many products yet, and most evidence comes from lab studies rather than human trials.
What does Linoleyl Gallate do in a beauty product?
Once applied, Linoleyl Gallate is thought to release both components gradually. The gallic acid portion scavenges free radicals and may reduce inflammation, while the linoleic acid part helps replenish skin lipids and strengthen the moisture barrier. The ester form may also help the molecule penetrate deeper into the skin compared to using gallic acid alone.
Is Linoleyl Gallate safe for most people?
Available data indicates low irritation and sensitization potential, but long-term human safety studies are lacking. As with any new ingredient, patch test before regular use.
Who should be careful with Linoleyl Gallate?
Anyone with a known allergy to gallic acid or linoleic acid sources (rare)
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.