Hibiscus 1000 mg, 60 Vegan Capsules

What Remedy's Hibiscus Is

Remedy's Hibiscus is 1,000 mg of Hibiscus sabdariffa per vegetarian capsule, 60 capsules per bottle. Hibiscus sabdariffa is roselle, the plant whose tart red calyces make hibiscus tea, sorrel, bissap and agua de jamaica. It is not the showy garden hibiscus, which is a different species.

People buy it mainly for blood pressure. The human evidence for that is real and modest, and this page gives you both halves: what the trials found, and how far a capsule is from what they used.

• 1,000 mg per capsule: Hibiscus sabdariffa, ground and hand-filled.
• 60 capsules: 2 months at 1 a day, 60,000 mg per bottle.
• Also called: roselle, sorrel, sour tea, karkade, flor de jamaica.
• Parts listed: flowers and leaves of Hibiscus sabdariffa.

The red drink sold as sorrel in the Caribbean, bissap in West Africa, karkade in Egypt and Sudan, zobo in Nigeria and agua de jamaica in Mexico is the same plant. The trials on this page come from several of those countries, plus the United States, Iran and Thailand, and every one of them used Hibiscus sabdariffa.

The full evidence map, from species to safety, is in hibiscus tea benefits and what the research shows.

Supplement Facts

Serving size: 1 Vegetarian Capsule. Servings per container: 60.

† Daily Value not established.

Other ingredients: Vegetarian capsule.

Directions: One capsule daily, morning or evening, with or without food.

No gluten, yeast, corn or dairy. Non-GMO. Handmade in Key Largo, Florida, USA.

The Blood Pressure Evidence

Blood pressure is the best-studied use of hibiscus. PubMed lists 1,010 records on Hibiscus sabdariffa, 45 tagged as clinical trials, and 22 trial records that measured blood pressure. The reviews of those trials do not all agree, and both sides are worth knowing.

• 2015 meta-analysis: 5 trials, 390 people, systolic down 7.58 mmHg, diastolic down 3.53.[1]Effect of sour tea (Hibiscus sabdariffa L.) on arterial hypertension: a systematic review and meta-analysis — Journal of Hypertension (2015) View source
• 2022 meta-analysis: 13 trials, 1,205 people, systolic down 6.67 mmHg vs placebo.
• 2025 umbrella review: 26 trials, 1,797 people, a fall that grew with the dose.
• 2021 Cochrane review: only 1 eligible trial, 60 people, very low certainty.[2]Roselle for hypertension in adults (Cochrane review update) — Cochrane Database of Systematic Reviews (2021) View source

Two patterns run through all of these trials. People who started with higher readings fell further, and the people enrolled were, as far as the trials report it, not yet taking blood pressure medicine. That makes hibiscus best studied as a first step in mild, untreated hypertension, and least studied as an add-on to existing treatment.

Cochrane used the strictest filter, placebo-controlled trials in diagnosed hypertension, and found almost nothing that qualified. The other reviews pooled wider evidence and found a modest, consistent fall. The full comparison is in hibiscus tea for blood pressure.

The Best Tea Trial

The trial most often quoted gave 65 adults with prehypertension or mild hypertension either hibiscus tea or a look-alike placebo drink for 6 weeks. None of them were taking blood pressure medicine, which matters when you read the result.

• Dose: 3 servings of 240 mL of brewed tea a day.
• Systolic: down 7.2 mmHg, against 1.3 mmHg on placebo.
• Diastolic: down 3.1 mmHg, not significantly different from placebo.
• Pattern: people who started higher fell further.

It was a tea, not a capsule, so it tells you what hibiscus can do rather than what this capsule will do.[3]Hibiscus sabdariffa L. tea (tisane) lowers blood pressure in prehypertensive and mildly hypertensive adults — The Journal of Nutrition (2010) View source

Capsule or Tea: The Dose Gap

This is the fact most hibiscus product pages leave out. A capsule holds 1 g of plant, while trial cups steeped 1.5 to 5 g of calyx each, and the strongest brews used 10 g a day. Capsule trials exist too, and they disagree with each other.

Absorption adds another layer. When 6 volunteers drank a hibiscus extract, only about 0.018% of its anthocyanins, the red pigments, appeared intact in their urine within 7 hours. A 2026 analysis of 3 trials pointed instead to hibiscus acid as a main active compound. Neither finding tells you exactly how a powder capsule compares with an infusion, which is why we do not claim an equivalence.

The closest trial to a whole-powder capsule used 500 mg of calyx powder once daily for 4 weeks and found systolic pressure lower than placebo.[4]Evaluation of the effects of roselle (Hibiscus sabdariffa L.) in adult patients with metabolic syndrome — Journal of Complementary and Integrative Medicine (2016) View source A larger 2025 trial of a 1,000 mg extract for 12 weeks found no effect on blood pressure.[5]Efficacy of Hibiscus sabdariffa L. extract on metabolic parameters in participants with abdominal obesity — Complementary Therapies in Medicine (2025) View source The arithmetic is set out in hibiscus supplement dosage, capsule vs tea.

How to Take It

Take 1 capsule a day, morning or evening, with or without food, as the label directs. No trial compared times of day, so choose a time you will keep to.

• Daily amount: 1 capsule, 1,000 mg.
• Consistency: the same time each day.
• Medicines: take tablets with water, not with hibiscus tea.
• Judge it: track home readings for 6 weeks.

A simple 6-week check gives you your own answer:

1. Take a week of home readings at the same time each morning.
2. Start 1 capsule a day and change nothing else.
3. Repeat the readings in weeks 2, 4 and 6.
4. Compare weekly averages and share them with your clinician.

If you prefer the tea route, how to make hibiscus tea gives the grams and steeping times the trials used.

Medicines to Ask About

Hibiscus changes how the body handles some medicines. Most of the evidence comes from tiny human studies or rats, but each one found a measurable change, so these are worth a conversation with your prescriber.

Diuretics deserve a separate mention. Hibiscus itself increases urine output, and in rats and rabbits it raised and prolonged blood levels of hydrochlorothiazide. If you take a water pill, ask before adding hibiscus, and watch for dizziness in the first 2 weeks.

The chloroquine study is the starkest: taken with karkade, the drug's exposure fell from 7.52 to 2.16 mg.h/L.[6]Significant reduction in chloroquine bioavailability following coadministration with Sudanese beverages including Karkadi — Journal of Antimicrobial Chemotherapy (1994) View source The full list, with the rat studies on hydrochlorothiazide, captopril and losartan, is in hibiscus side effects and drug interactions.

Pregnancy and Breastfeeding

Do not take hibiscus while pregnant or breastfeeding. There are 0 human trials in pregnancy, and the cautions come from rat studies of offspring.

• Human pregnancy trials: 0.
• Rat offspring: later puberty after mothers drank hibiscus extract.
• Uterus: rat studies point to relaxation, not contraction.
• Breastfeeding: no human data.

If you took hibiscus before you knew you were pregnant, there is no human evidence that an occasional dose causes harm. Stop, keep the bottle for the label, and mention it at your next appointment. Hibiscus also hides in fruit teas and iced blends, so read labels for the rest of the pregnancy.

The puberty finding came from pregnant rats given hibiscus extract as drinking water.[7]Delayed puberty onset in offspring of rats that consumed aqueous extract of Hibiscus sabdariffa during pregnancy — Nigerian Journal of Physiological Sciences (2008) View source More in hibiscus tea during pregnancy.

Kidneys

Hibiscus increases urine flow, and people with kidney stones or kidney disease often ask whether it is safe for them. The human evidence is small: 2 urine studies with mixed signals on stone risk, and short trials showing no harm to kidney function.

• Uric acid: excretion rose in stone formers on 1.5 g of calyx twice daily.
• Oxalate: unchanged in 1 study, trending up in another.
• Kidney disease: ask your nephrologist first.
• Hydration: drink water as well.

The uric acid finding came from 18 people over 15 days.[8]Uricosuric effect of Roselle (Hibiscus sabdariffa) in normal and renal-stone former subjects — Journal of Ethnopharmacology (2008) View source The rest is in hibiscus tea and the kidneys.

What Hibiscus Does Not Do

Hibiscus is often sold for far more than blood pressure. The trials behind the other claims are weaker, and some of the best ones are plainly negative, so this page does not repeat them.

• Weight loss: 6 trials, 339 people, a 0.27 kg difference; no real effect.
• Cholesterol: 2 reviews disagree, 1 null and 1 finding LDL lower.
• Replacing medicine: not tested, and not a reason to stop anything.
• Curing any disease: no evidence.

A 2024 meta-analysis found no clinical benefit for weight. Hibiscus is a modest, well-studied herb for blood pressure, and that is how we describe it.

Why Choose Remedy's Hibiscus

No trial shows one hibiscus capsule outperforming another, so the honest differences are the plant, the amount and what this page is willing to tell you.

• The right species: Hibiscus sabdariffa, not garden hibiscus.
• Single ingredient: hibiscus only, so your total is easy to count.
• The dose gap stated: 1 g of plant, not a trial cup.
• The cautions stated: medicines, pregnancy and kidneys.

Handmade in Key Largo, Florida, by a company making supplements since 1972. Each capsule holds the ground herb and nothing else, so if you also drink hibiscus tea or take a blend that contains it, you can add up your daily total with confidence.

Frequently Asked Questions

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