Several common drinks can measurably lower blood pressure, with beetroot juice and hibiscus tea showing the strongest results in clinical trials. Beetroot juice has reduced systolic blood pressure by roughly 8 points in people with hypertension, while three daily cups of hibiscus tea dropped it by about 7 points over six weeks. Other options, including pomegranate juice, low-fat milk, green tea, and unsalted tomato juice, also contribute meaningful reductions when consumed regularly.
Beetroot Juice
Beetroot juice is the most extensively studied blood-pressure-lowering drink, and its effects are driven by a specific mechanism. Beets are rich in naturally occurring nitrates. When you drink the juice, bacteria on your tongue convert those nitrates into a compound that eventually becomes nitric oxide in your bloodstream. Nitric oxide relaxes and widens your blood vessels, which directly reduces the pressure your blood exerts on artery walls.
In a phase 2 clinical trial published by the American Heart Association, people with hypertension who drank beetroot juice daily saw their systolic pressure drop by 7.7 points and their diastolic pressure drop by 5.2 points on 24-hour monitoring. The peak reduction reached 8.1 systolic points by week six of daily consumption. The effect kicks in relatively quickly: blood pressure drops are greatest about two to three hours after drinking the juice, which is when nitric oxide levels peak in the blood. After that peak, levels gradually decline, which is why daily consumption matters more than an occasional glass.
Most studies use about 250 ml (roughly one cup) of concentrated beetroot juice per day. One practical note: antibacterial mouthwash can kill the tongue bacteria responsible for the nitrate conversion, potentially blunting the blood pressure benefit.
Hibiscus Tea
Hibiscus tea, made from dried hibiscus flowers steeped in hot water, produced a 7.2-point drop in systolic blood pressure over six weeks in a USDA-supported trial. Participants drank three cups daily. Those who started with higher readings (systolic of 129 or above) saw even larger drops: 13.2 points systolic and 6.4 points diastolic.
The active compounds in hibiscus appear to work as natural vasodilators and mild diuretics, helping the body shed excess sodium. It’s naturally caffeine-free, which makes it a good option if you’re sensitive to stimulants or prefer an evening drink. Brew it from loose dried flowers or tea bags and drink it hot or iced. The tart, cranberry-like flavor works well without added sugar.
Pomegranate Juice
A large meta-analysis combining data from multiple clinical trials found that pomegranate supplementation (mostly as juice) significantly reduced both systolic and diastolic blood pressure. The studies used daily doses ranging from about 43 ml to 500 ml, with intervention periods lasting anywhere from one week to nearly a year. Pomegranate juice is packed with polyphenol antioxidants that help protect blood vessel lining and improve their ability to relax.
The main limitation is sugar content. Pure pomegranate juice contains roughly 30 grams of sugar per cup, so sticking to a smaller daily serving (around 4 to 8 ounces) gives you the vascular benefits without excess calories. Avoid brands with added sugar or juice blends where pomegranate is a minor ingredient.
Green Tea
Green tea’s blood pressure benefits come from its polyphenols, particularly a compound that improves blood vessel function, reduces oxidative stress, and lowers inflammation. Animal studies show it can significantly reduce blood pressure and enhance the ability of arteries to expand. In human populations, regular green tea consumption is associated with better cardiovascular outcomes.
Coffee, by contrast, creates a short-term spike in blood pressure, and this spike is largest in people who already have hypertension. A study comparing caffeine’s acute effects across different blood pressure groups found the biggest jumps in people already diagnosed with high blood pressure, followed by those in borderline ranges. Green tea contains some caffeine, but its polyphenols appear to counterbalance and even reverse the pressure increase. If you’re choosing between the two specifically for blood pressure, green tea is the better option.
Unsalted Tomato Juice
A year-long Japanese study of 481 residents found that unsalted tomato juice lowered systolic blood pressure by about 4 points and diastolic by about 2.4 points among participants with untreated prehypertension or hypertension. As a bonus, it also reduced LDL cholesterol in people with elevated levels. The key word is “unsalted.” Regular tomato juice or vegetable juice cocktails are typically loaded with sodium, which works against any blood pressure benefit. Check labels carefully, or juice fresh tomatoes at home.
Low-Fat Milk
An analysis of nine studies covering nearly 60,000 people found that drinking just over two cups of milk per day was associated with lower blood pressure and a reduced incidence of hypertension. Milk delivers three minerals that all play a role in blood pressure regulation: calcium, potassium, and magnesium. Low-fat or skim versions provide these minerals without the saturated fat that can affect cardiovascular health over time.
This doesn’t mean milk will produce the dramatic drops seen with beetroot juice or hibiscus tea. Its effect is more about consistent, long-term support for healthy blood pressure rather than an acute reduction.
Water and Hydration
Plain water doesn’t contain any active compounds that lower blood pressure, but staying adequately hydrated prevents a chain reaction that can raise it. When you’re dehydrated, your blood volume drops. Your body compensates by releasing vasopressin, a hormone that constricts blood vessels to maintain pressure. The result is that chronic mild dehydration can keep your blood pressure elevated even when everything else is well managed.
There’s no magic number of glasses. Your needs depend on body size, activity level, climate, and diet. The simplest check is urine color: pale yellow means you’re well hydrated.
What to Watch Out For
Grapefruit juice deserves a specific warning. While it contains beneficial compounds, it interferes with the way your body processes certain blood pressure medications, particularly a class of drugs commonly prescribed for hypertension. Grapefruit blocks an enzyme in your intestinal wall that normally limits how much medication gets absorbed, which can cause dangerously high drug levels in your blood. If you take any prescription medication for blood pressure, check whether grapefruit is flagged as an interaction before adding it to your routine.
Sugar content is the other practical concern. Fruit juices like pomegranate and even some commercial beetroot juice blends contain significant sugar. The blood pressure benefit disappears if the drink contributes to weight gain or insulin resistance over time. Choose unsweetened versions, limit portions, or opt for whole-food alternatives like hibiscus tea or green tea that deliver benefits with essentially zero calories.
The Mineral Connection
Many of these drinks work partly because they’re rich in potassium, which directly counterbalances sodium’s effect on blood pressure. The American Heart Association recommends limiting sodium to no more than 2,300 mg per day, with 1,500 mg as the ideal target. But increasing potassium matters just as much. Recent research supports shifting the overall sodium-to-potassium ratio rather than focusing on sodium restriction alone, since potassium helps your kidneys flush out excess sodium and relaxes blood vessel walls.
Beetroot juice, pomegranate juice, tomato juice, and milk are all meaningful sources of potassium. Building a daily habit around one or two of these drinks, while keeping sodium intake in check, creates a compounding effect that goes beyond what any single dietary change can achieve on its own.