Ingredient review
Citrus Depressa Fruit Extract
INCI: CITRUS DEPRESSA FRUIT EXTRACT
A gentle, antioxidant-rich citrus extract that may help brighten skin and protect against environmental damage, but more human studies are needed.
In plain English
Citrus Depressa Fruit Extract comes from a small, tart citrus fruit called Shiikuwasha, grown mainly in Okinawa, Japan. In skincare, it's valued for its high levels of vitamin C and other antioxidants that can help protect skin from pollution and UV stress, and may support a more even skin tone. It's generally very gentle and unlikely to cause irritation, making it a nice option for those who find stronger citrus extracts too harsh.
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
- natural
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Citrus Depressa Fruit 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 Citrus Depressa Fruit 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
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A natural extract obtained from the fruit of Citrus depressa, a citrus species native to East Asia. It is rich in flavonoids (like nobiletin and tangeretin) and vitamin C, which give it antioxidant and skin-brightening potential.
How it works
The flavonoids and vitamin C in the extract neutralize free radicals (unstable molecules that can damage skin cells), helping to prevent oxidative stress. Vitamin C also inhibits the enzyme tyrosinase, which can reduce excess melanin production and support a more even skin tone over time.
Pros
Rich in unique flavonoids
Contains nobiletin and tangeretin, potent antioxidants not found in all citrus fruits, which may offer superior protection against oxidative stress.
Gentle on skin
Unlike some citrus extracts that can be irritating, this one is generally well-tolerated and suitable for most skin types, including sensitive skin.
Cons and cautions
Limited human research
Most evidence comes from lab studies or traditional use; more clinical trials on humans are needed to confirm its efficacy in skincare.
Potential for mild sensitivity
Natural fruit acids can still cause a slight tingling or redness in very reactive skin, so patch testing is recommended.
Best for
- Anyone looking for a gentle antioxidant to protect skin from pollution and UV damage
- People with dull or uneven skin tone seeking a natural brightening ingredient
Use caution if
- Individuals with known citrus allergies should patch test first
- Those with extremely sensitive or broken skin may want to avoid until healed
Usage tips
Safety summary
Citrus Depressa Fruit Extract is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, though individuals with citrus allergies should patch test. No significant safety concerns have been reported in the scientific literature.
Research notes
Research on Citrus depressa focuses on its high flavonoid content, particularly nobiletin and tangeretin, which show antioxidant and anti-inflammatory activity in lab studies. Human studies are limited, but traditional use and preliminary data support its role in skin brightening and protection.
Common label clues
- Typical concentration
- 0.1% to 2% in leave-on products
- Regulatory status
- Generally recognized as safe for cosmetic use in the US and EU, with no specific restrictions beyond standard labeling requirements.
- Common uses
- Serums, Moisturizers, Brightening treatments
- Environmental note
- Sourced from the Shiikuwasha fruit, which is cultivated in Okinawa, Japan. Sustainable farming practices are encouraged to protect local biodiversity.
Good to know
- This extract is often used in Japanese skincare for its brightening and protective properties.
- It is sometimes called 'Shequasar' or 'Hirami Lemon' in English-language ingredient lists.
Common questions
What is Citrus Depressa Fruit Extract in beauty products?
Citrus Depressa Fruit Extract comes from a small, tart citrus fruit called Shiikuwasha, grown mainly in Okinawa, Japan. In skincare, it's valued for its high levels of vitamin C and other antioxidants that can help protect skin from pollution and UV stress, and may support a more even skin tone. It's generally very gentle and unlikely to cause irritation, making it a nice option for those who find stronger citrus extracts too harsh.
What does Citrus Depressa Fruit Extract do in a beauty product?
The flavonoids and vitamin C in the extract neutralize free radicals (unstable molecules that can damage skin cells), helping to prevent oxidative stress. Vitamin C also inhibits the enzyme tyrosinase, which can reduce excess melanin production and support a more even skin tone over time.
Is Citrus Depressa Fruit Extract safe for most people?
Citrus Depressa Fruit Extract is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, though individuals with citrus allergies should patch test. No significant safety concerns have been reported in the scientific literature.
Who should be careful with Citrus Depressa Fruit Extract?
Individuals with known citrus allergies should patch test first Those with extremely sensitive or broken skin may want to avoid until healed
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.