Compound or practice · Supplement
Hibiscus
Hibiscus tea reliably lowers blood pressure a few points — one of the better food-based options.
- Overall grade
- Grade B
- Last revised
- 1
- graded outcome
- 0
- references listed
A structured monograph in Prometheus's bundled library. Its grades are the monograph's own reading of the evidence, not a peer-reviewed review.
2 at grade B — 2 graded rows
What is known
Each outcome with its grade (how strong the evidence is, A to D), the size of the effect where the entry records one, and how often studies agree.
- Blood pressureEvidence grade B
Several mmHg
Moderatehigh
Conditions
How the entry reads its effect on diagnosed conditions: the direction first, then the grade. Never a substitute for the person who treats you.
- Hypertension ImprovesEvidence grade BFood-basedGrade B
What is uncertain
Read off the same rows as above. Nothing here is added that the entry does not itself record.
- Caution with Blood-pressure medications: Additive blood-pressure lowering.
Interactions
Documented pairings with supplements and medicines. A medicine on this list is a conversation for whoever prescribes it.
Blood-pressure medicationsCaution
Additive blood-pressure lowering.
The evidence in words
What it is
Hibiscus sabdariffa tea/extract is a tart botanical studied for blood pressure.
How it works
Anthocyanins with ACE-inhibiting and diuretic-like actions lowering blood pressure.
What the evidence shows
Meta-analyses show hibiscus meaningfully lowers systolic and diastolic blood pressure, comparable to some other food interventions — a genuinely useful, pleasant option. Additive with antihypertensive medication.
How to use it
2–3 cups of strong hibiscus tea daily, or a standardized extract.
Safety & interactions
Safe; additive blood-pressure lowering; caution in pregnancy and with some drugs. antihypertensives — Additive blood-pressure lowering.
Bottom line
A tasty, evidence-backed way to shave a few points off blood pressure. 2–3 cups daily; mind additive effects with BP meds.
How it is used
As the entry records it, from the studies it summarises. Not a recommendation for you — doses that suit a trial population may not suit you.
- Standard
- 2–3 cups strong tea/day.
Related reading
Entries that share this one's tags or conditions.
- Cocoa FlavanolsThe flavanols in cocoa genuinely improve blood-vessel function and modestly lower blood pressure — the sugar is the catch.Evidence grade B
- NattokinaseA fermented-soy enzyme with fibrinolytic activity and modest blood-pressure data — real mechanism, a bleeding caution.Evidence grade C
- Cocoa Flavanols for Blood pressureEvidence grade B — Modest reductionEvidence grade B
- Hibiscus for Blood pressureEvidence grade B — Several mmHgEvidence grade B
Sources
This entry lists no references of its own.
Last revised . A grade is this entry's reading of the evidence, not medical advice.