Best teas to help lower blood pressure

If you want a tea for blood pressure with real evidence behind it, hibiscus is the clear front runner, with green and black tea some way behind. The effects are genuine but small, so treat tea as a pleasant addition to the habits that do the heavy lifting rather than a substitute for them.

What tea for blood pressure can and cannot do

Tea is one of the most studied drinks in nutrition research, and the picture is consistent: measurable, modest, and slow. A few mmHg is a typical result, which is roughly what one other lifestyle change achieves on its own.

That is not nothing, because small reductions stack. But no tea replaces medication, and nobody should stop a prescription because they have started drinking hibiscus. Tea belongs alongside the changes in our guide to how to lower blood pressure, not instead of them.

1. Hibiscus, the strongest evidence

Hibiscus, sold as sour tea or roselle, has the best case of any tea here. A 2022 systematic review and meta-analysis by Ellis and colleagues in Nutrition Reviews pooled 17 randomised trials and found hibiscus lowered systolic pressure by about 7.1 mmHg compared with placebo, with the largest reductions in people whose blood pressure was already elevated at the start.

Two honest caveats. The confidence interval around that figure was wide, running from roughly 1 to 13 mmHg, and the trials varied a lot in dose and duration. The authors called for more work to pin down an effective dose. Treat 7 mmHg as the optimistic end of a real effect rather than a number you can bank on. If you take blood pressure medication, mention hibiscus to your doctor or pharmacist before making it a daily habit, because an effect of this size is worth them knowing about.

2. Green tea, small but consistent

Green tea has been studied more than any other. A 2014 meta-analysis by Peng and colleagues in Scientific Reports pooled 13 randomised controlled trials covering 1,367 people and found green tea lowered systolic pressure by 1.98 mmHg and diastolic pressure by 1.92 mmHg.

That is a small effect, and the analysis found it was clearest in trials using lower doses of green tea polyphenols over longer periods. Green tea also brings caffeine, which raises blood pressure briefly in people who are not used to it. Our guide to caffeine and blood pressure explains the short term spike and why it matters for your readings.

3. Black tea, similar and modest

Black tea lands in much the same place. A 2014 meta-analysis by Greyling and colleagues in PLoS ONE pooled 11 studies covering 378 people drinking four to five cups a day, and found reductions of 1.8 mmHg systolic and 1.3 mmHg diastolic. The researchers noted the effect is small but could still matter across a whole population.

If you already drink a few strong cups of black tea a day, this is quietly good news. It is not a reason to start drinking five cups a day if you do not want to.

4. Caffeine free herbal teas, pleasant but unproven

Chamomile, rooibos, peppermint and the rest are worth drinking if you enjoy them, and swapping a sugary drink for a herbal tea helps your overall health. The blood pressure evidence for them is thin and inconsistent compared with hibiscus, green and black tea, so expect no measurable change from chamomile alone. What you eat moves the number far more reliably, as our foods that lower blood pressure list and the DASH diet explained simply both show.

The one tea to be careful with: liquorice

Liquorice tea can push blood pressure up rather than down. Blood Pressure UK explains that glycyrrhizic acid, the compound responsible, affects fluid balance through an enzyme in the kidney, and that liquorice tea as well as liquorice sweets can raise blood pressure. The NHS warns that eating more than 57g of black liquorice a day for two weeks can raise blood pressure and cause an irregular heart rhythm, particularly for people over 40 with a history of heart disease or high blood pressure. If you drink liquorice tea regularly and your readings have crept up, mention it to your doctor.

When to see a doctor

Talk to your doctor or pharmacist before adding a daily hibiscus habit if you take blood pressure medication, are pregnant, or have kidney or liver problems. Never change a prescription on your own.

Book an appointment if your home average stays at or above 130/80 mmHg over several weeks. If you ever record a reading higher than 180 systolic or higher than 120 diastolic, the American Heart Association advises waiting five minutes and measuring again, then contacting your doctor without delay if it stays that high. Call emergency services immediately if a very high reading comes with chest pain, shortness of breath, numbness or weakness, vision changes or difficulty speaking. This article is general information and does not replace personalised medical advice.

Start this habit in CardioVibe

A few mmHg is too small to spot in a single reading, which is exactly why tracking helps. Log your readings free in CardioVibe, compare your weekly average before and after you change what you drink, and bring the record to your next appointment. It supports your care rather than replacing it.

Frequently asked questions

Which tea is best for high blood pressure?

Hibiscus has the strongest evidence. The 2022 Nutrition Reviews meta-analysis found about 7 mmHg lower systolic pressure compared with placebo, with the biggest effect in people whose blood pressure was elevated to begin with.

How much hibiscus tea should I drink to lower blood pressure?

There is no agreed dose. Trials typically used the equivalent of one to two strong cups a day, and the Nutrition Reviews authors specifically called for more research to establish a reliable dose and duration.

Does green tea lower blood pressure?

Slightly. Pooled trial data put the effect at around 2 mmHg systolic and 2 mmHg diastolic, which is real but much smaller than diet, exercise or medication achieve.

Can drinking tea replace blood pressure medication?

No. The effects are a few mmHg at best, and medication is prescribed for reasons tea cannot address. Keep taking what you have been prescribed unless your doctor tells you otherwise.