Hibiscus Sabdariffa Flower Extract
Hibiscus sabdariffa is widely consumed safely as a beverage. Clinical trials demonstrate modest blood pressure lowering effects (~7.6 mmHg systolic, ~3.5 mmHg diastolic) in stage 1 hypertension.
What it is
Extract from the calyces of Hibiscus sabdariffa (roselle); a tart, ruby-red botanical used in teas and beverages.
Provides tart flavor, vibrant red color, and antioxidant content to teas, juices, and herbal beverages.
Why it's flagged
- potential interactions with antihypertensives and diuretics
- may affect blood pressure
What regulators actually say
"Meta-analysis of randomized controlled trials found significant effects of H. sabdariffa supplementation in lowering both systolic blood pressure (SBP, -7.58 mmHg) and diastolic blood pressure (DBP, -3.53 mmHg)."
"Sour tea (hibiscus) can be an effective medication for lowering blood pressure in individuals with stage 1 hypertension."
Regulatory status
United States — FDA
Used as a flavoring/herbal tea ingredient; generally regarded as safe for food/beverage use.
European Union — EFSA
Permitted as food ingredient; regulated as botanical/herbal infusion in EU.
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