Dietitians and clinical studies point to nitrate-rich beet juice and hibiscus tea as two beverages that may modestly lower systolic blood pressure when consumed regularly, although neither is a substitute for medication or broader hypertension treatment.
By yourNEWS Media Newsroom.
Two plant-based beverages may provide modest support for people trying to maintain healthier blood pressure, with research linking beet juice to increased nitric oxide production and hibiscus tea to small reductions in systolic pressure.
A Health.com report published Aug. 12 cited three registered dietitians who identified beet juice as a potentially useful addition to a heart-healthy diet because beets are naturally high in inorganic nitrate. The report also pointed to hibiscus tea as another beverage with evidence of a blood pressure benefit when consumed regularly rather than occasionally. :chatgpt-content-reference{index=”0″}
The evidence does not show that either drink cures hypertension or can replace prescribed treatment. Instead, clinical research suggests the beverages may produce relatively small changes in blood pressure that could complement established approaches such as reducing excess sodium, maintaining a healthy weight, exercising and following an overall heart-healthy diet.
Beet juice works through a biological pathway involving nitrate, nitrite and nitric oxide.
After nitrate-rich foods are consumed, bacteria in the mouth convert some of the nitrate to nitrite. That nitrite can subsequently contribute to production of nitric oxide, a signaling molecule that helps relax and widen blood vessels. The resulting vasodilation can reduce resistance to blood flow and, in some people, lower blood pressure. Research has also shown that the oral microbiome plays an important role in this nitrate-nitrite-nitric oxide pathway. :chatgpt-content-reference{index=”1″}
Avery Zenker, MAN, RD, told Health that nitric oxide supports blood-vessel health and therefore plays a role in maintaining healthy blood pressure. Carlyne Remedios, RD, told the publication that trials among adults with hypertension have found beetroot-derived nitrate can lower systolic pressure by several millimeters of mercury over periods lasting as long as two months. :chatgpt-content-reference{index=”2″}
The larger body of clinical research generally supports a modest effect, particularly on systolic blood pressure, although estimates vary.
A 2024 systematic review and meta-analysis evaluated 11 randomized trials involving 349 adults with hypertension. Beetroot juice produced an average reduction of 5.31 mmHg in clinic-measured systolic blood pressure compared with control treatments. Researchers did not find a significant effect on clinic diastolic pressure or on 24-hour blood pressure measurements, however, and rated the certainty of the evidence as low because of differences among the studies. :chatgpt-content-reference{index=”3″}
Another meta-analysis limited to randomized trials of hypertensive adults found an average systolic reduction of 4.95 mmHg with nitrate-rich beetroot juice, while the approximately 0.9 mmHg reduction in diastolic pressure was not statistically significant. The seven trials included 218 participants and lasted between three and 60 days. :chatgpt-content-reference{index=”4″}
Those findings are consistent with earlier analyses that also reported greater effects on systolic than diastolic blood pressure. A review of 22 trials found average reductions of about 3.55 mmHg systolic and 1.32 mmHg diastolic among participants consuming beetroot juice. :chatgpt-content-reference{index=”5″}
Research has also begun examining whether age-related changes in oral bacteria affect the response to dietary nitrate.
In a randomized crossover study involving 39 younger adults and 36 adults ages 67 to 79, researchers found that nitrate-rich beetroot juice affected the oral microbiome differently according to age. The older participants experienced an average four-point reduction in mean arterial pressure after the beetroot intervention, while the younger group did not show the same blood pressure response. Changes in blood pressure were associated with increased nitrite availability and shifts in specific oral bacteria. :chatgpt-content-reference{index=”6″}
A separate small crossover trial involving 15 adults ages 56 to 71 with treated hypertension found that four weeks of nitrate-rich beetroot juice increased the abundance of some nitrate-reducing oral bacteria, including Neisseria, while decreasing Veillonella. That study did not find a sustained improvement in 24-hour or home blood pressure compared with nitrate-depleted placebo juice, illustrating that not every trial has shown a blood pressure benefit. :chatgpt-content-reference{index=”7″}
The differing results are one reason researchers describe beet juice as a possible adjunct rather than a treatment that works consistently for everyone.
Beyond nitrate, beet juice supplies potassium and other plant compounds.
One 8-ounce cup of 100% beet juice contains about 62 calories, 317 milligrams of potassium, 2.7 grams of fiber, 1.8 grams of protein and small amounts of copper, folate, magnesium and iron, according to nutrition data cited by Health.com. :chatgpt-content-reference{index=”8″}
Potassium is relevant to blood pressure because it helps regulate fluid balance and counter some of the effects of dietary sodium. Diets rich in potassium-containing foods such as fruits, vegetables and legumes are generally incorporated into heart-healthy dietary patterns.
Health.com recommends choosing 100% beet juice without added sugar. People unfamiliar with the beverage may want smaller servings initially because larger quantities can produce gastrointestinal discomfort. Beet juice can be consumed alone or incorporated into smoothies and other drinks. :chatgpt-content-reference{index=”9″}
Hibiscus tea has a different nutritional profile but has also been studied for blood pressure effects.
The caffeine-free tea is generally made from Hibiscus sabdariffa and contains anthocyanins and other polyphenolic compounds. Jennifer Pallian, BSc, RD, told Health that those antioxidants may help support blood-vessel relaxation and healthy blood pressure. :chatgpt-content-reference{index=”10″}
One frequently cited randomized, double-blind clinical trial enrolled 65 adults between ages 30 and 70 who had prehypertension or mild hypertension and were not taking blood pressure-lowering medication.
Participants drank either three 8-ounce servings of brewed hibiscus tea daily or a placebo beverage for six weeks.
At the end of the study, systolic blood pressure in the hibiscus group had fallen by an average of 7.2 mmHg, compared with a 1.3 mmHg reduction in the placebo group. The difference between groups was statistically significant.
Diastolic pressure declined by 3.1 mmHg in the hibiscus group compared with 0.5 mmHg in the placebo group, but that difference did not reach statistical significance. Participants who entered the trial with higher systolic readings tended to show larger responses. :chatgpt-content-reference{index=”11″}
The result supports the possibility that regular hibiscus consumption can modestly affect systolic pressure, particularly among people whose readings are already elevated. It does not establish that hibiscus tea works as well as prescription antihypertensive medication or that it prevents heart attacks, strokes or other cardiovascular outcomes.
Health.com likewise cautioned that drinking one cup occasionally should not be expected to noticeably alter blood pressure. The potential effect observed in clinical research has generally involved regular consumption over a period of weeks. :chatgpt-content-reference{index=”12″}
The distinction is important because hypertension is a long-term cardiovascular condition rather than a problem that can typically be controlled with a single food or beverage.
The dietitians interviewed by Health emphasized that beverages intended to support healthy blood pressure should generally be low in sodium, added sugar and saturated fat. Nutrients and plant compounds such as potassium, dietary nitrate and antioxidants may provide additional benefits, but they work within the context of the entire diet. :chatgpt-content-reference{index=”13″}
That broader dietary pattern can include vegetables, fruit, legumes, whole grains and other minimally processed foods.
The research also does not support treating all nitrate-containing foods as equivalent to processed meats containing added nitrite or nitrate preservatives. Vegetable sources such as beets contain nitrate within a substantially different nutritional and chemical environment that includes antioxidants and other plant compounds.
Similarly, naturally sweet beet juice should not be interpreted as a limitless beverage simply because it contains potentially beneficial nitrate. Portion size, calorie intake, blood sugar considerations and the rest of a person’s diet remain relevant.
Neither beet juice nor hibiscus tea should be used to discontinue or reduce prescribed blood pressure medication without medical guidance. The evidence instead supports viewing them as possible dietary additions that may provide small improvements in blood pressure for some people.
The strongest available evidence for beetroot juice points toward a modest reduction in systolic pressure, while results for diastolic and around-the-clock measurements have been less consistent. Hibiscus tea has shown a systolic benefit in controlled research as well, but the number and size of trials remain limited.
Taken together, the findings suggest that the two beverages may have a place within a broader blood pressure-conscious diet, with beet juice acting largely through dietary nitrate and nitric oxide pathways and hibiscus providing plant compounds that may influence vascular function.
For people with hypertension, however, the measured changes remain modest. The available research supports adding such foods to an evidence-based cardiovascular lifestyle rather than relying on either drink as a stand-alone treatment.
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