The dried calyces of Hibiscus sabdariffa (Sour Tea), rich in anthocyanins (delphinidin-3-sambubioside) and organic acids. Hibiscus acts as a natural ACE inhibitor, stimulates cholinergic vasodilation, and promotes mild natriuresis (sodium flushing), reliably lowering blood pressure in pre-hypertensive and hypertensive individuals.
Educational information only — never stop or change a prescribed medication without talking to your prescriber first.
May have additive blood pressure-lowering effects if combined with prescription antihypertensive medications; monitor blood pressure regularly. Avoid large medicinal doses during early pregnancy.
Evidence level: Strong
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