Last verified: 17 days ago
Hibiscus Flower
Also known as: Hibiscus rosa-sinensis, Hibiscus sabdariffa, roselle, sorrel flower, Jamaica flower
Evidence under review. — Not yet rated
Traditional flower extract with early lab-based anticancer research. No human trials yet.
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What it does
Hibiscus flower is a plant extract used in teas and supplements, traditionally valued for its antioxidant properties. In laboratory cell studies, an aqueous hibiscus extract was shown to...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
No established dose (insufficient research data)
What the Science Says
Hibiscus flower is a plant extract used in teas and supplements, traditionally valued for its antioxidant properties. In laboratory cell studies, an aqueous hibiscus extract was shown to selectively trigger cell death in breast cancer cells — including hard-to-treat triple-negative breast cancer — while leaving normal healthy cells unharmed. These findings are early-stage and come only from lab experiments, not human trials, so no effective dose or timeframe for humans can be established from the available evidence.
What It Doesn't Do
Not proven to treat or prevent cancer in humans — all anticancer data is from lab cells only. No clinical evidence it lowers blood pressure, aids weight loss, or detoxes the body. Don't assume it's safe to combine with chemotherapy without medical supervision. Not a substitute for any prescribed medication.
Evidence-Based Benefits
Lab studies show hibiscus extract selectively kills breast cancer cells while sparing healthy cells.
Weak EvidenceEffective at: No established dose
Supporting studies (click to view on PubMed):
Absorption & Bioavailability
Unknown — no human pharmacokinetic or absorption data in the provided studies.
Red Flags to Watch For
- Hibiscus tea can cause false-positive digoxin blood test results — a serious concern for heart patients on digoxin therapy.
- No human clinical trials exist in the provided evidence base — all anticancer findings are from cell cultures only.
- May interact with prescription medications; consult a doctor before use, especially if on heart or blood pressure drugs.
- Over 1,000 supplement products contain hibiscus, but the ingredient lacks clinical trial validation for most marketed claims.
Products Containing Hibiscus Flower
See how Hibiscus Flower is used in these analyzed products:
Frequently Asked Questions
What does Hibiscus Flower do?
Traditional flower extract with early lab-based anticancer research. No human trials yet.
What is the effective dose of Hibiscus Flower?
No established dose (insufficient research data)
Is Hibiscus Flower safe?
Hibiscus tea can cause false-positive digoxin blood test results — a serious concern for heart patients on digoxin therapy.
What doesn't Hibiscus Flower do?
Not proven to treat or prevent cancer in humans — all anticancer data is from lab cells only.
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: 2026-05-25