Ingredient review
Dihydroquercetin Tetracaprylate
INCI: DIHYDROQUERCETIN TETRACAPRYLATE
A potent, oil-friendly antioxidant that helps defend skin against pollution and UV damage without the stability issues of pure dihydroquercetin.
In plain English
Dihydroquercetin tetracaprylate is a modified version of a natural antioxidant found in plants like milk thistle and larch trees. The original antioxidant, dihydroquercetin, is water-soluble and can break down quickly in formulas. By attaching four caprylic acid chains (a fatty acid from coconut oil), chemists made it oil-soluble and much more stable. This means it can be easily added to creams, serums, and sunscreens, where it helps neutralize free radicals—unstable molecules from UV rays and pollution that can damage skin cells and speed up visible aging.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
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
Useful, but context matters
Dihydroquercetin Tetracaprylate 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 Dihydroquercetin Tetracaprylate.
- 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 ester of dihydroquercetin (taxifolin), a flavonoid antioxidant, and caprylic acid. The modification improves its solubility in oils and its stability in cosmetic formulations.
How it works
Once applied to the skin, it acts as a free-radical scavenger, donating electrons to neutralize reactive oxygen species before they can damage collagen, elastin, and cell membranes. Its oil-soluble nature allows it to integrate into the skin's lipid barrier, providing longer-lasting antioxidant protection compared to water-soluble alternatives.
Pros
Enhanced stability
Unlike pure dihydroquercetin, this esterified version resists oxidation in the bottle and on the skin, so you get reliable antioxidant protection throughout the product's shelf life.
Oil-soluble versatility
Because it dissolves in oils, it can be formulated into a wide range of products—from lightweight serums to rich creams—without the need for special delivery systems.
Cons and cautions
Limited human studies
Most evidence for dihydroquercetin's skin benefits comes from lab and animal studies; large-scale human trials on this specific ester are still scarce.
Potential for lower potency
The chemical modification may slightly reduce its antioxidant activity compared to the parent molecule, though the trade-off in stability is often worth it.
Best for
- Anyone looking for a stable, oil-soluble antioxidant to add to their daytime routine
- People with normal to dry skin who prefer richer, oil-based serums or creams
Use caution if
- Those with a known allergy to taxifolin or caprylic acid derivatives (rare)
Usage tips
Safety summary
Dihydroquercetin tetracaprylate is considered safe for topical use at typical concentrations. It has low irritation and comedogenic potential. No significant safety concerns have been reported in cosmetic use.
Research notes
Research on dihydroquercetin (taxifolin) shows strong antioxidant and anti-inflammatory activity in vitro. The tetracaprylate ester has been studied primarily for its stability and formulation benefits, with limited but promising data on skin protection. More human clinical studies are needed to confirm efficacy.
Common label clues
- Typical concentration
- 0.1% to 2% in leave-on products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. Not classified as a drug ingredient.
- Common uses
- Anti-aging serums, Day creams, Eye treatments, Sunscreen boosters
- Environmental note
- Caprylic acid is typically derived from coconut or palm oil; look for sustainably sourced palm oil if that is a concern.
Good to know
- Dihydroquercetin is also known as taxifolin and is found in onions, milk thistle, and Douglas fir bark
- This ingredient is often used in 'clean beauty' formulas as a natural-derived antioxidant alternative
Common questions
What is Dihydroquercetin Tetracaprylate in beauty products?
Dihydroquercetin tetracaprylate is a modified version of a natural antioxidant found in plants like milk thistle and larch trees. The original antioxidant, dihydroquercetin, is water-soluble and can break down quickly in formulas. By attaching four caprylic acid chains (a fatty acid from coconut oil), chemists made it oil-soluble and much more stable. This means it can be easily added to creams, serums, and sunscreens, where it helps neutralize free radicals—unstable molecules from UV rays and pollution that can damage skin cells and speed up visible aging.
What does Dihydroquercetin Tetracaprylate do in a beauty product?
Once applied to the skin, it acts as a free-radical scavenger, donating electrons to neutralize reactive oxygen species before they can damage collagen, elastin, and cell membranes. Its oil-soluble nature allows it to integrate into the skin's lipid barrier, providing longer-lasting antioxidant protection compared to water-soluble alternatives.
Is Dihydroquercetin Tetracaprylate safe for most people?
Dihydroquercetin tetracaprylate is considered safe for topical use at typical concentrations. It has low irritation and comedogenic potential. No significant safety concerns have been reported in cosmetic use.
Who should be careful with Dihydroquercetin Tetracaprylate?
Those with a known allergy to taxifolin or caprylic acid derivatives (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.