What Foods Are Bad for High Blood Pressure?

Salty, heavily processed, and alcohol-rich foods and drinks are the biggest dietary drivers of high blood pressure, but the full list goes well beyond the salt shaker. Research over the past decade has tied ultra-processed foods, sugary beverages, certain meats, energy drinks, and even licorice to measurable increases in blood pressure. Some of these connections are obvious; others catch people off guard. The practical question is which foods matter most and which are overblown.

Salt Is Still the Headliner

Excess sodium is the single most studied dietary cause of elevated blood pressure. When you eat a lot of salt, your body holds onto extra water to dilute the sodium in your bloodstream. That expanded fluid volume pushes harder against your artery walls. But the effects go deeper than simple water retention: high sodium intake also stiffens arteries, impairs the lining of blood vessels, and ramps up nervous-system signals that constrict blood vessels.¹ Research has also identified a hormone called endogenous ouabain, which is elevated in roughly 40% of people with high blood pressure and appears to amplify the blood-pressure-raising effect of salt.²

Not everyone reacts to salt equally. About a third of otherwise healthy people have an exaggerated blood pressure response to sodium, a trait called salt sensitivity. Among people who already have hypertension, more than half are salt-sensitive. Women are affected more often than men, and the trait becomes more common as you age.³ Salt sensitivity is itself considered an independent risk factor for heart disease and death, which means some people face a double penalty from a high-sodium diet.

Even a single high-salt meal can cause harm in the short term. One study found that eating a meal with a typical restaurant-level sodium load impaired the ability of arteries to dilate within 30 minutes, an early marker of cardiovascular stress.⁴ This doesn’t mean one salty dinner will give you hypertension, but it illustrates how quickly sodium changes the way your blood vessels behave.

Where the Sodium Actually Comes From

Most people think of salt as what you sprinkle at the table, but the majority of dietary sodium comes from packaged and prepared foods that don’t even taste particularly salty. A study of children’s diets found that about a third of sodium from “hidden” sources came from bread, processed cereals, and white cheese alone.⁵ The same pattern holds for adults. Canned soups, deli meats, frozen dinners, condiments like soy sauce and ketchup, and even sweet items like flavored oatmeal packets all contribute meaningful sodium. Reading nutrition labels helps, but the sheer number of moderate-sodium foods in a typical day is what adds up.

Ultra-Processed Foods

Sodium is a big part of why ultra-processed foods are bad for blood pressure, but it’s not the whole story. These products, which include things like packaged snacks, instant noodles, frozen pizzas, and mass-produced baked goods, tend to be engineered with combinations of salt, sugar, fat, and additives that together seem to do more damage than any single ingredient. A large Brazilian study found that people with the highest ultra-processed food intake had a 23% greater risk of developing hypertension compared to those who ate the least.⁶ A study of middle-aged U.S. adults found that people in the highest quarter of ultra-processed food consumption had a 15% higher risk of developing hypertension than those in the lowest quarter.⁷

These are observational studies, so they can’t prove ultra-processed food directly causes hypertension. People who eat a lot of packaged food may also exercise less or carry more weight. But the consistency across different populations and the size of the effect, even after researchers adjust for body weight and other factors, suggests something real is going on beyond just the sodium content.

Red and Processed Meats

Processed meats like bacon, sausage, hot dogs, and deli slices are obvious sodium bombs, but the concern with red meat and blood pressure extends beyond salt. When your gut bacteria metabolize certain compounds found in red and processed meat, they produce a substance called TMAO, which has been linked to stiffening of the arteries, impaired blood vessel function, and oxidative stress.⁸ TMAO levels rise with higher red meat and processed meat intake, and they correlate with conventional cardiovascular risk scores.

An interesting nuance comes from research on nitrates. Vegetables like beets, spinach, and arugula are rich in dietary nitrates, which the body converts into nitric oxide, a molecule that relaxes blood vessels and lowers blood pressure. In contrast, the nitrates added to processed meats as preservatives don’t appear to deliver the same benefit. One large U.K. study found that higher vegetable nitrate intake was associated with lower blood pressure, while nitrate from processed meats was not, and was even associated with slightly higher systolic blood pressure at the highest intake levels.⁹ So the source of the nitrate matters: a beet salad and a hot dog are not doing the same thing to your arteries.

Alcohol

Alcohol raises blood pressure in a straight line: the more you drink, the higher your numbers go, with no safe threshold below which the effect disappears. A large meta-analysis of cohort studies found that drinking about one standard drink per day (around 12 grams of alcohol) was associated with systolic blood pressure roughly 1.25 mmHg higher than not drinking at all, while four drinks a day pushed it up by nearly 5 mmHg.¹⁰ Those numbers may sound modest, but at a population level even a few points of sustained elevation in blood pressure translates to a meaningful increase in heart attacks and strokes.

The dose-response relationship holds for diastolic blood pressure too, and it has been replicated across very different populations. A study of commercial vehicle drivers in Nigeria confirmed the same stepwise pattern: heavier drinkers had significantly higher blood pressure than moderate drinkers, who in turn had higher readings than nondrinkers.¹¹ The type of alcohol doesn’t particularly matter. Beer, wine, and spirits all raise blood pressure when consumed in quantity.

Energy Drinks

Energy drinks deserve their own category because they combine high caffeine doses with sugar, taurine, and other stimulants in a way that appears to spike blood pressure more sharply than coffee alone. A systematic review of the cardiovascular effects of energy drinks found that over half the studies reported a statistically significant rise in systolic blood pressure, and about 60% found a significant increase in diastolic blood pressure.¹²

The effects are not limited to adults. A randomized trial in children and teenagers found that a single energy drink raised systolic blood pressure by up to about 5 mmHg and diastolic by about 3 mmHg compared to a placebo, and increased the prevalence of clinically elevated blood pressure readings.¹³ A separate randomized trial in adults found that consuming a high volume of energy drinks significantly raised both peripheral and central blood pressure compared to a caffeinated control drink, suggesting the effect is driven by more than caffeine alone.¹⁴ If you already have high blood pressure or borderline readings, energy drinks are one of the more avoidable risks.

Sugary Drinks and Artificially Sweetened Beverages

Sugar-sweetened beverages, including sodas, fruit punches, and sweetened teas, are strongly linked to hypertension risk. A dose-response meta-analysis found that each additional 250 mL per day of sugar-sweetened beverages was associated with a 10% higher risk of hypertension.¹⁵ The pathway likely involves weight gain, insulin resistance, and the metabolic effects of fructose, which is the dominant sugar in most sweetened drinks.

What surprises many people is that diet drinks don’t appear to be harmless. That same meta-analysis found that each additional 250 mL per day of artificially sweetened beverages was associated with an 8% higher risk of hypertension. A separate meta-analysis pooling data from over 227,000 subjects found that the highest consumers of artificially sweetened beverages had about a 14% higher risk of developing hypertension compared to the lowest consumers.¹⁶ And a third meta-analysis found a similar pooled risk increase of about 15%.¹⁷

These are all observational findings, and it’s possible that people who drink a lot of diet soda also have other habits or health conditions that raise blood pressure. But the consistency of the association across multiple large studies makes it worth knowing. Switching from regular soda to diet soda may reduce calorie intake, but it doesn’t necessarily protect your blood pressure.

Saturated Fat and Arterial Stiffness

The connection between dietary fat and blood pressure gets less attention than sodium, but there is evidence that saturated fat specifically can stiffen arteries over time. A long-running prospective study in men found that higher saturated fat consumption at the start of the study was associated with higher systolic and diastolic blood pressure, and that after nearly 18 years of follow-up, those eating more saturated fat had stiffer arteries. The study also suggested that polyunsaturated fats (found in fish, nuts, and vegetable oils) had the opposite effect, meaning the type of fat you eat may matter as much as the total amount.¹⁸

In practical terms, the foods highest in saturated fat overlap heavily with other categories on this list: processed meats, full-fat cheese, butter, and many ultra-processed snack foods. Reducing these tends to improve blood pressure, though whether the benefit comes specifically from less saturated fat, less sodium, or less processing overall is hard to disentangle.

Coffee and Caffeine

Caffeine’s effect on blood pressure is real but complicated by tolerance. Controlled trials show that drinking roughly five cups of coffee a day raises blood pressure by about 2/1 mmHg compared to abstaining or drinking decaf.¹⁹ That’s a modest effect, and for many habitual drinkers it may partly or fully disappear. A randomized, placebo-controlled study found that a single cup of caffeinated coffee raised blood pressure in people who didn’t normally drink coffee, but the effect disappeared in regular coffee drinkers.²⁰

However, tolerance isn’t universal. A study that gave participants 250 mg of caffeine daily (roughly two to three cups of coffee) found that even after five days of regular consumption, half the subjects still showed a full blood pressure spike with each dose. The other half had completely adapted.²¹ There’s no easy way to know which group you fall into without monitoring your own readings. If you’re trying to lower your blood pressure and you drink a lot of coffee, it’s worth checking whether your numbers drop during a few days off caffeine. For most habitual drinkers, coffee is a minor player compared to sodium, alcohol, and ultra-processed food.

Licorice

This one surprises people. Real licorice, the kind made from the licorice root, contains glycyrrhizic acid, a compound that mimics a hormone called aldosterone and causes your body to retain sodium and lose potassium. The result is a direct and sometimes substantial rise in blood pressure. A randomized crossover trial found that eating just 100 mg of glycyrrhizic acid daily, equivalent to a relatively small amount of licorice candy or tea, raised systolic blood pressure by about 3 mmHg and suppressed the body’s natural renin and aldosterone systems by 30% and 45%, respectively.²²

The researchers noted that licorice turned out to be “more potent than previously known,” since the effect appeared at a dose lower than what earlier guidelines considered safe. This matters for people who regularly eat licorice candy, drink licorice root tea, or take herbal supplements containing licorice extract. Most licorice-flavored candy sold in the U.S. is actually flavored with anise oil and doesn’t contain glycyrrhizic acid, but European and specialty licorice products often do. If you have high blood pressure and a licorice habit, it’s worth checking what’s in your favorite brand.

MSG and Monosodium Glutamate

MSG contains sodium, but only about a third as much per gram as table salt. That has led some people to suggest it might be a blood-pressure-friendly way to add flavor. The evidence, however, suggests it’s not that simple. A five-year study of Chinese adults found that MSG intake was associated with significant increases in both systolic and diastolic blood pressure over time, with a particularly strong effect in women.²³ The study also found that total glutamate intake from all dietary sources was positively associated with rising blood pressure. Whether this is due to the sodium component, a separate effect of glutamate itself, or the fact that MSG-heavy diets tend to overlap with high-sodium processed food diets is still debated.

Over-the-Counter Substances and Herbal Supplements

Some things that raise blood pressure aren’t foods in the traditional sense but are consumed regularly enough to matter. Nonsteroidal anti-inflammatory drugs like ibuprofen and naproxen, decongestants containing pseudoephedrine, and supplements containing ephedra are all associated with clinically meaningful blood pressure increases.²⁴ In some individuals these increases stay within the normal range, but in others they can push blood pressure above 140/90 mmHg or even trigger a hypertensive crisis. The risk varies greatly from person to person and product to product, which makes it hard to give blanket advice beyond: if you take any of these regularly and have high blood pressure, talk to your doctor or pharmacist about alternatives.

The Ratio That Matters More Than Sodium Alone

One of the more useful findings in blood pressure research is that the ratio of sodium to potassium in your diet may predict your blood pressure better than either mineral on its own. A review of both randomized trials and observational studies found that the sodium-to-potassium ratio was more strongly associated with blood pressure outcomes and the development of hypertension than sodium intake or potassium intake considered separately.²⁵

This has a practical implication that often gets lost in “just eat less salt” advice. Many of the foods that raise blood pressure, like processed meats, packaged snacks, and fast food, are not just high in sodium but also very low in potassium. Meanwhile, the foods that tend to lower blood pressure, like fruits, vegetables, beans, and dairy, are potassium-rich. So the benefit of switching from processed to whole foods may be double: you cut sodium and add potassium at the same time, improving the ratio from both directions. Focusing only on removing the bad foods without adding potassium-rich ones captures only half the potential benefit.