Ingredient review
Kohlrabi Extract
INCI: Brassica Oleracea Gongylodes Extract
A gentle, antioxidant-rich plant extract that may help soothe and protect skin, but research is still emerging.
In plain English
Kohlrabi extract is made from the stems and leaves of the kohlrabi plant, a type of cabbage. It contains natural antioxidants like vitamin C and flavonoids that can help protect skin from environmental damage. In skincare, it's used mainly for its soothing and hydrating properties, though it's not as well-studied as some other plant extracts.
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
- natural
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Kohlrabi Extract 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 Kohlrabi Extract.
- 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
Kohlrabi extract is a natural ingredient derived from the Brassica oleracea gongylodes plant, commonly known as kohlrabi. It is rich in vitamins (especially vitamin C), minerals, and antioxidant compounds like flavonoids and glucosinolates.
How it works
In a cosmetic product, kohlrabi extract works primarily as an antioxidant, neutralizing free radicals that can cause premature aging. It also has mild anti-inflammatory properties, which can help calm irritated skin. The extract may support the skin's natural barrier function by providing hydration and soothing effects.
Pros
Gentle and soothing
Kohlrabi extract has mild anti-inflammatory properties, making it suitable for sensitive or reactive skin types without causing irritation.
Natural antioxidant source
Rich in vitamin C and flavonoids, it helps protect skin from free radical damage caused by UV and pollution, supporting a healthier complexion over time.
Cons and cautions
Limited research
Compared to well-studied antioxidants like green tea or vitamin C, kohlrabi extract has fewer clinical studies backing its efficacy in skincare, so results may be less predictable.
Variable potency
The concentration of active compounds can vary depending on the plant source and extraction method, leading to inconsistent benefits across different products.
Best for
- People with sensitive or easily irritated skin looking for gentle soothing ingredients
- Those interested in natural, plant-based skincare with antioxidant benefits
Use caution if
- Individuals with a known allergy to Brassica plants (cabbage, broccoli, kale) should patch test first
Usage tips
Safety summary
Kohlrabi extract is considered safe for topical use in cosmetics. It has a low irritation and comedogenic risk, making it suitable for most skin types. As with any new ingredient, patch testing is recommended for those with plant allergies.
Research notes
Research on kohlrabi extract specifically in skincare is limited. Most evidence comes from general studies on Brassica vegetables, which are rich in antioxidants and anti-inflammatory compounds. More targeted studies are needed to confirm its benefits in cosmetic applications.
Common label clues
- Typical concentration
- 0.1% to 2% in leave-on products
- Regulatory status
- Generally recognized as safe for use in cosmetics in the US and EU when used according to good manufacturing practices. No specific restrictions apply.
- Common uses
- Serums, Moisturizers, Soothing creams
- Environmental note
- Kohlrabi is a widely cultivated vegetable with a relatively low environmental footprint, and its extract is typically produced from agricultural byproducts, supporting sustainability.
Good to know
- Kohlrabi is a member of the Brassica family, which also includes broccoli, cabbage, and kale, known for their high nutrient content.
- This extract is often used in formulations aimed at sensitive or redness-prone skin due to its gentle nature.
Common questions
What is Kohlrabi Extract in beauty products?
Kohlrabi extract is made from the stems and leaves of the kohlrabi plant, a type of cabbage. It contains natural antioxidants like vitamin C and flavonoids that can help protect skin from environmental damage. In skincare, it's used mainly for its soothing and hydrating properties, though it's not as well-studied as some other plant extracts.
What does Kohlrabi Extract do in a beauty product?
In a cosmetic product, kohlrabi extract works primarily as an antioxidant, neutralizing free radicals that can cause premature aging. It also has mild anti-inflammatory properties, which can help calm irritated skin. The extract may support the skin's natural barrier function by providing hydration and soothing effects.
Is Kohlrabi Extract safe for most people?
Kohlrabi extract is considered safe for topical use in cosmetics. It has a low irritation and comedogenic risk, making it suitable for most skin types. As with any new ingredient, patch testing is recommended for those with plant allergies.
Who should be careful with Kohlrabi Extract?
Individuals with a known allergy to Brassica plants (cabbage, broccoli, kale) should patch test first
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.