What Juice Lowers Blood Pressure: Ranked by Science

Beetroot juice has the strongest and most consistent evidence for lowering blood pressure of any juice studied so far. Across multiple pooled analyses, it reduces systolic blood pressure by roughly 5 mmHg in people with elevated readings, with the effect largely driven by its unusually high nitrate content. Pomegranate, tomato, and Concord grape juice also show promising results, though the evidence behind each is thinner and less uniform. Below is what the research actually supports, juice by juice, so you can tell the well-studied options from the overhyped ones.

Beetroot Juice Has the Most Evidence

No other juice has been put through as many controlled trials for blood pressure as beetroot juice. A 2022 systematic review and meta-analysis of trials in people with high blood pressure found that nitrate from beetroot juice lowered systolic blood pressure by about 5 mmHg compared to placebo, a clinically meaningful drop on par with some first-line medications at low doses.¹ A separate meta-analysis following European hypertension guidelines reported a similar figure, with a mean systolic reduction of about 5.3 mmHg.²

The effect on diastolic blood pressure is less consistent. Some pooled results show no statistically significant change in diastolic readings, while individual trials do. In a trial of Tanzanian adults with elevated blood pressure, for instance, drinking nitrate-rich beetroot juice daily for two months dropped 24-hour systolic pressure by nearly 11 mmHg and diastolic pressure by about 5 mmHg in the group that received both nitrate and a polyphenol-rich juice.³ A smaller trial in otherwise healthy adults found a systolic drop of 4 to 5 mmHg within six hours of a single serving, though only in men after adjusting for baseline differences.⁴

What makes beetroot juice stand apart is the consistency of direction. Almost every well-designed trial shows systolic pressure going down, and the effect is largest in people who already have elevated readings. If your blood pressure is already normal, you are less likely to see a noticeable shift. The daily nitrate doses used across studies ranged from roughly 200 to 800 mg, which corresponds to about 250 to 500 mL of juice depending on the product.

How Beetroot Juice Actually Works

The active ingredient in beetroot juice is not a vitamin or antioxidant in the usual sense. It is inorganic nitrate, a compound the body converts into nitric oxide through a two-step process. You swallow the nitrate, bacteria on your tongue reduce it to nitrite, and then your stomach and blood vessels convert that nitrite into nitric oxide. Nitric oxide relaxes the smooth muscle around blood vessels, causing them to widen and blood pressure to fall.

This mechanism is why the oral microbiome matters more than you might expect. A study tracking changes after four weeks of daily beetroot juice found that supplementation shifted the composition of bacteria in participants’ mouths, increasing the abundance of Neisseria (a genus involved in nitrate-to-nitrite conversion) and decreasing Veillonella.⁵ People who use antibacterial mouthwash regularly may blunt this pathway, because the mouthwash kills the very bacteria that perform the first conversion step. If you are drinking beetroot juice specifically for blood pressure, that is worth knowing.

Pomegranate Juice Works Through a Different Pathway

Pomegranate juice ranks second on the evidence ladder, though it lowers blood pressure through a completely different mechanism than beetroot. Rather than supplying nitrate, pomegranate acts as a natural inhibitor of angiotensin-converting enzyme, or ACE, the same enzyme targeted by a widely prescribed class of blood pressure medications. An early clinical study of hypertensive patients found that two weeks of daily pomegranate juice reduced ACE activity in the blood by about 36% and lowered systolic pressure by roughly 5%.⁶

More recent laboratory work has pinpointed the specific polyphenols responsible. Of 24 major compounds tested, three stood out as especially potent ACE inhibitors, and the most active of them also stimulated the production of nitric oxide in blood vessel cells, boosting the expression of the enzyme that produces it by over fivefold in cell culture.⁷ So pomegranate may work on two fronts: blocking the enzyme that constricts vessels and simultaneously encouraging the molecule that relaxes them.

The catch is that human trial data on pomegranate is thinner than on beetroot. The doses, durations, and populations studied vary widely, and there is no large pooled analysis dedicated to pomegranate juice and blood pressure the way there is for beetroot. The direction of the evidence is encouraging, but the confidence interval around the effect size is wider.

Tomato Juice Shows Moderate Promise

Tomato juice has attracted interest mainly because of lycopene, the carotenoid pigment that gives tomatoes their red color, along with potassium and other minerals. A large observational study followed nearly 500 Japanese residents who drank unsalted tomato juice freely for a year. Among the 94 participants who had untreated elevated blood pressure at baseline, systolic pressure dropped by about 4 mmHg and diastolic by about 2.4 mmHg on average.⁸ The same study also noted improvements in LDL cholesterol.

A small quasi-experimental trial comparing tomato juice head-to-head with cucumber juice in hypertensive patients found a systolic reduction of about 7 mmHg in the tomato group versus about 4 mmHg for cucumber, with the control group unchanged.⁹ These are modest-sized studies without the rigorous blinding of the beetroot trials, so the numbers should be read as suggestive rather than definitive. One important caveat: the results apply to unsalted tomato juice. Many commercial tomato juices are loaded with sodium, which would undermine any potential benefit.

Concord Grape Juice Has Mixed Results

Concord grape juice is rich in polyphenols, including anthocyanins and resveratrol, and it gets mentioned frequently in heart-health discussions. The trial evidence for blood pressure, however, is split. One double-blind trial in Korean men with hypertension found that eight weeks of daily grape juice reduced systolic pressure by about 7 mmHg and diastolic by about 6 mmHg compared to baseline.¹⁰ But a larger, well-controlled American trial measuring 24-hour ambulatory blood pressure in people with prehypertension or early-stage hypertension found no effect on the primary endpoint at all.¹¹

The discrepancy probably reflects differences in study populations, baseline blood pressure levels, and measurement methods. The Korean trial enrolled men with outright hypertension, while the American trial included people with only mildly elevated readings. This pattern repeats across juice research generally: people with higher starting blood pressure tend to see bigger drops. If your blood pressure is already close to normal, grape juice is unlikely to move the needle.

Juices That Underperform Expectations

Berry juices, especially blueberry and tart cherry, are often promoted for cardiovascular health. The research does support benefits for cholesterol and antioxidant status, but the blood pressure evidence is weak. A three-arm placebo-controlled trial testing both Montmorency tart cherry juice and blueberry juice found no statistically significant differences in systolic blood pressure for either juice compared to placebo. Blueberry juice did improve total and LDL cholesterol, but blood pressure was not among the measured benefits.¹² A separate trial of tart cherry juice concentrate in healthy adults similarly found no effect on systolic blood pressure, diastolic blood pressure, or arterial stiffness.¹³

Orange juice is another popular choice that gets less support than you might expect for blood pressure specifically. One randomized trial examined hesperidin, the main flavonoid in orange juice, in people with mildly elevated blood pressure. The researchers discussed mechanisms by which hesperidin could help, including improvements in how blood vessel linings function, but the results for blood pressure reduction were not the headline finding.¹⁴ Orange juice may have broader cardiovascular value, but calling it a blood-pressure-lowering juice based on current evidence would be a stretch.

Celery juice has a dedicated following online, but the published evidence amounts to a single case report of an elderly man whose blood pressure improved over six months of daily celery juice intake, dropping from 150/80 to 118/82 mmHg.¹⁵ A case report of one person is the lowest rung of medical evidence. It is interesting enough to motivate a proper trial, but it does not support a recommendation.

The Broader Picture for Fruit Juice and Blood Pressure

Zooming out from individual juices, meta-analyses that pool all types of 100% fruit juice together show a real but modest overall effect. One systematic review of randomized controlled trials found that 100% fruit juice intake lowered systolic blood pressure by about 3 mmHg and diastolic by about 1.7 mmHg on average, along with improvements in arterial compliance and endothelial function.¹⁶ A separate meta-analysis of 19 trials with over 600 subjects found a borderline reduction of about 2 mmHg in diastolic pressure, but no significant change in systolic pressure or cholesterol levels.¹⁷

The takeaway from these umbrella analyses is that drinking fruit juice as a category has a small blood-pressure-lowering effect, but the juices driving that effect are not all contributing equally. Beetroot juice, with its unique nitrate pathway, pulls the average up. Some of the other juices may be contributing little or nothing to the blood pressure portion of the pooled result, even while offering other cardiovascular benefits.

Why Potassium Matters Alongside the Flashier Mechanisms

Much of the attention around juices and blood pressure goes to polyphenols and nitrate, but potassium plays an underappreciated supporting role. Many of the juices with the best evidence, including beetroot, pomegranate, and tomato, are also good sources of potassium. Data from a large U.S. population analysis found that higher potassium intake was significantly associated with lower odds of having blood pressure above the hypertensive threshold, with an inverse dose-response relationship.¹⁸ The landmark INTERSALT study, one of the largest international investigations of electrolytes and blood pressure, confirmed that potassium excretion is negatively correlated with blood pressure even after adjusting for confounders.¹⁹

This means that the benefit of a juice is not always about one star compound. Beetroot juice delivers nitrate and potassium. Pomegranate delivers ACE-inhibiting polyphenols and potassium. Tomato juice delivers lycopene and potassium. The potassium is doing quiet but measurable work alongside the headline molecules, helping your kidneys excrete sodium and easing pressure on artery walls. It also means that if you are already eating a potassium-rich diet, the marginal gain from adding juice may be smaller than the trials suggest.

Polyphenols and Nitric Oxide

Beyond beetroot’s nitrate pathway, many fruit juices contain polyphenols that can promote nitric oxide production through a completely separate route. Instead of supplying the raw material (nitrate) for nitric oxide, polyphenols activate the enzyme in blood vessel linings that produces nitric oxide on its own.²⁰ Research on aronia (chokeberry) juice, for example, showed that its polyphenols triggered the relaxation of coronary arteries by switching on this enzyme through a chain of signaling steps.²¹ Pomegranate’s most potent compound does the same thing in cell studies, as noted earlier.

The practical implication is that mixing juice types could theoretically give you both pathways at once: nitrate from beetroot and polyphenol-driven enzyme activation from pomegranate or a dark berry. No large trial has tested a deliberate two-juice combination against a single juice for blood pressure, so this remains plausible biology rather than proven strategy. But it explains why the Tanzanian trial that combined nitrate-rich beetroot juice with a polyphenol-rich juice saw especially large drops in blood pressure compared to nitrate alone.³

The Sugar Question

Any conversation about drinking juice for health has to reckon with sugar. A glass of beetroot juice has roughly 20 grams of sugar, and pomegranate juice can have even more. For people worried about weight or blood sugar, this is a legitimate concern. However, the evidence suggests that fructose from fruit juice does not raise blood pressure the way fructose from sugar-sweetened beverages does. A study examining dietary fructose sources found that fructose from sodas and sweetened drinks was associated with higher blood pressure and a 29% greater risk of hypertension per 10-gram increment, while fructose from fruits and fruit juice showed no such association.²²

The likely explanation is that the “food matrix” matters: when fructose arrives alongside fiber, polyphenols, potassium, and other bioactives, the net metabolic effect is different from isolated sugar dissolved in flavored water. This does not mean juice sugar is harmless for everyone. People with diabetes or insulin resistance should still account for the carbohydrate load. But the specific fear that juice sugar will cancel out the blood pressure benefit is not supported by the current data.

Why Your Results May Differ From the Trials

Gut microbiome composition is one of the most underappreciated sources of variability in how people respond to polyphenol-rich juices. A study using humanized mouse models found that the metabolic impact of aronia juice supplementation depended in part on the microbiome donor. Aronia drove a sevenfold increase in bacteria from the Eggerthellaceae family, a group known to metabolize polyphenols into absorbable forms.²³ If your gut lacks the bacteria that activate polyphenols, you may absorb the compounds but not convert them into the forms that actually relax blood vessels.

Baseline blood pressure also matters enormously. Across nearly every juice studied, the effect is largest in people who start with genuinely elevated readings and smallest (or nonexistent) in people who are already in the normal range. If your blood pressure is 115/70, do not expect beetroot juice to drop it further in a meaningful way. The body has homeostatic mechanisms that resist pushing blood pressure below its set point in healthy people. The trials showing the biggest numbers enrolled people with hypertension or prehypertension for exactly this reason.

Processing and What Reaches Your Glass

Not all juice products are created equal when it comes to retaining the compounds that drive blood pressure effects. Traditional pasteurization uses high heat, which can degrade polyphenols, anthocyanins, and vitamin C. A review of juice processing technologies found that newer methods like high-pressure processing preserve nutritional value more effectively by eliminating the need for preservatives and stabilizers. Ultrasound-based processing (sonication) often resulted in juices with higher levels of polyphenols and anthocyanins compared to thermally processed versions.²⁴

For beetroot juice, the nitrate content is relatively heat-stable, so even conventionally processed products tend to retain their blood-pressure-lowering potential. But for pomegranate or grape juice, where the active polyphenols are more heat-sensitive, choosing cold-pressed or high-pressure-processed options could make a difference. Reading labels for “not from concentrate” or “cold-pressed” is a reasonable heuristic, though it is not a guarantee, since storage time and light exposure also degrade bioactives over weeks on a shelf.

Grapefruit Juice Deserves a Special Warning

Grapefruit juice occupies an unusual position in this conversation. It contains flavonoids and other compounds that could theoretically benefit blood vessels, but it also inhibits a key enzyme system in the intestine and liver that metabolizes a wide range of medications. This enzyme, CYP3A4, handles the breakdown of many cardiovascular drugs, including calcium channel blockers, certain beta-blockers, angiotensin receptor blockers, and statins.²⁵ When grapefruit juice blocks that enzyme, it effectively increases the dose of the drug your body absorbs, sometimes dramatically. The interaction is especially strong with felodipine, a calcium channel blocker used specifically for hypertension.²⁶

If you are taking any prescription medication for blood pressure, cholesterol, or heart rhythm, check with your pharmacist before adding grapefruit juice to your routine. The interaction is not theoretical or rare; it is well-documented enough that drug labels frequently mention it. Other citrus juices like orange juice do not cause the same problem, because they lack the specific furanocoumarins that inhibit CYP3A4.