Allium Cepa Bulb Extract
INCI: ALLIUM CEPA BULB EXTRACT
Also known as: Allium Cepa Bulb Extract
A plant extract with antioxidant compounds that may help soothe and condition the skin
At a glance
Best For Skin Types
All, Sensitive, Combination
Addresses
Usage Frequency
Daily
What Is Allium Cepa Bulb Extract?
Allium cepa bulb extract is derived from onion bulbs and contains bioactive compounds including polyphenols and quercetin flavonoids. These are naturally occurring antioxidants that onions produce as part of their defensive chemistry.
In skincare formulations, this extract functions as a skin conditioning agent. The antioxidant profile suggests it may help protect skin from oxidative stress, though the specific mechanisms by which these compounds benefit skin remain an area of ongoing research.
Benefits for Your Skin
How It Works
Onion bulbs contain sulphur-based compounds and flavonoid antioxidants that form when cells are damaged or processed. These bioactive molecules can help reduce oxidative stress — an imbalance of free radicals that contributes to skin ageing and inflammation.
When applied topically in extract form, these compounds may help condition the skin barrier and provide antioxidant protection. However, the bioavailability of these compounds when applied to skin (rather than ingested) is not yet well established through clinical research.
Clinical Evidence & References
Research has confirmed that onion bulb extracts contain significant levels of polyphenols and quercetin with measurable antioxidant activity in laboratory assays. Studies have also explored how these flavonoids are metabolised when absorbed systemically, suggesting they remain bioactive in the body.
Evidence for topical skincare benefits is more limited. Whilst traditional use and antioxidant chemistry are promising, well-designed clinical trials specifically examining this ingredient's effects on skin conditions — particularly for redness, irritation, or scar appearance — remain sparse. Further research would strengthen understanding of its practical efficacy in skincare products.
Published Research
How to Use
Allium cepa bulb extract is typically found in concentrations below 0.1% in skincare products, often as one of several soothing or conditioning agents. Use as directed on your product; there is no specific guidance for optimising results beyond consistent application. If combining with other actives, observe your skin's response.
Safety & Precautions
How widely it's used
Regulatory information
Standardised cosmetic-ingredient identifiers used by regulators.
Show identifiers
- INCI Name
- ALLIUM CEPA BULB EXTRACT
- EC Number
- 232-498-2
- Function
- Skin Conditioning
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