Citrus Bioflavonoids
Also known as: hesperidin, naringenin, naringin, hesperetin, eriocitrin, nobiletin, quercetin, citrus polyphenols, bioflavonoid complex
Effective Dosage
No established dose from provided studies
What the Science Says
Citrus bioflavonoids are natural plant pigments found in oranges, lemons, and grapefruits — including hesperidin, naringenin, and nobiletin. In a small human crossover trial, a Mediterranean diet rich in citrus significantly raised blood levels of these compounds and reduced inflammation markers in people with type 2 diabetes. One small human study also found that 250 mg daily of a citrus-rosemary combination increased skin's resistance to UV-induced redness by 34–56% over 8–12 weeks, though it's unclear how much of that effect came from citrus alone.
What It Doesn't Do
Won't cure psoriasis — the paper suggesting this is a theoretical protocol, not a clinical trial. No proven benefit for kidney stones in humans — the rat studies are promising but don't translate directly. Not a replacement for diabetes medication — lab-based DPP-4 inhibition doesn't mean it works like a gliptin drug in your body. No proven anti-cancer effect in humans — the breast cancer cell research was done in a lab dish, not in people.
Evidence-Based Benefits
Citrus bioflavonoids are plant compounds that may have antioxidant properties and could support immune function. Some studies suggest they might help reduce inflammation and improve overall health, but the evidence is limited and inconsistent.
Weak EvidenceEffective at: No established dose
Source: auto-research
Absorption & Bioavailability
Unknown from provided studies — supplement products tested showed wildly variable bioflavonoid content (0.8% to 33.3%), meaning the dose you actually absorb from a supplement is highly unpredictable.
Red Flags to Watch For
- Supplement products tested in one study ranged from 0.8% to 33.3% actual bioflavonoid content — label claims may be unreliable.
- Most positive findings come from animal (rat) studies or lab cell experiments, not human clinical trials.
- The only human skin protection study combined citrus with rosemary — you can't credit citrus alone for the results.
- The psoriasis 'cure' paper is a theoretical opinion piece, not a clinical trial — treat those claims with extreme skepticism.
- No established safe or effective human dose has been identified from the available research.
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-06