Hibiscus Extract (Hibiscus sabdariffa)

Heart health & circulation

Function & benefits

Flowers rich in anthocyanins and polyphenols; a meta-analysis of randomised trials suggests hibiscus supports normal systolic and diastolic blood pressure, a clinical trial confirms this in adults with slightly raised blood pressure, and it has a mild diuretic effect.

Dosage & how to use

Recommended dose	400–800 mg of standardised extract daily (or 2–3 cups of tea)
Best time to take	With breakfast or lunch
Frequency	1–2 times daily

Best forms to choose

Hibiscus extract standardised for anthocyanins in capsules, or flower tea.

Important warnings

Avoid it if you have low blood pressure

Avoid during pregnancy and breastfeeding

Consult your doctor if you manage your blood pressure with medication

Drug interactions

It may strengthen blood pressure drugs and diuretics (such as hydrochlorothiazide) and may reduce the absorption of chloroquine; monitor your readings when combining them.

View in the supplements guide

Related supplements

Scientific references

Serban C et al. J Hypertens 2015 (meta-analysis) — PMID: 25875025
McKay DL et al. J Nutr 2010 — PMID: 20018807

📚 Published sources and research: European Food Safety Authority (EFSA) • National Institutes of Health (NIH - ODS) • PubMed / Cochrane databases

Content last updated: 17 October 2026 · Based on published sources and research (EFSA / NIH / PubMed)

⚖️ Medical disclaimer: The information and data provided here are for health education and nutritional guidance only. They are not a medical diagnosis and never replace a direct consultation with your doctor or pharmacist. Always consult your doctor before starting any supplement, especially during pregnancy or breastfeeding or when taking long-term medication.