Most research on beets and blood pressure uses the equivalent of roughly one to two medium beets per day, typically consumed as about 250 mL (one cup) of beetroot juice containing somewhere around 5 to 8 mmol of dietary nitrate. That dose consistently lowers systolic blood pressure by a few points in healthy adults, with effects appearing within hours and persisting for weeks when intake continues. But the blood-pressure story is only one piece of what beets do, and the “right” amount depends on what you are trying to get out of them.
Why Beets Lower Blood Pressure
Beets are one of the richest dietary sources of inorganic nitrate. After you eat them, bacteria living on your tongue convert that nitrate into nitrite, which then gets further converted in the body into nitric oxide. Nitric oxide relaxes and widens blood vessels, which reduces the resistance your heart has to pump against and lowers blood pressure. It also improves oxygen and nutrient delivery to organs and working muscles.1Taylor & Francis Online (Crit Rev Food Sci Nutr). The benefits and risks of beetroot juice consumption: a systematic review This pathway is sometimes called the nitrate-nitrite-nitric oxide pathway, and it works alongside the body’s own nitric oxide production system rather than replacing it.
One detail that surprises people: the process depends on bacteria in your mouth. If you kill those bacteria, you short-circuit the whole chain. Research shows that antibacterial mouthwash use can disable the conversion of nitrate to nitrite, potentially blunting the cardiovascular benefits of nitrate-rich foods.2PubMed. A stepwise reduction in plasma and salivary nitrite with increasing strengths of mouthwash following a dietary nitrate load That doesn’t mean you should skip oral hygiene, but if you are eating beets specifically for blood pressure, it’s worth knowing that strong antiseptic rinses used right around the same time could undermine the effect.
How Much Beetroot Juice for Blood Pressure
The most-studied dose is about 250 mL of beetroot juice, which typically delivers somewhere between 5 and 8 mmol of nitrate depending on the product and the beetroot variety. In one randomized, placebo-controlled trial of healthy adults, a single serving of beetroot juice containing about 5.7 mmol of nitrate produced a meaningful drop in both systolic and diastolic blood pressure within two to three hours, and doubling the nitrate dose roughly doubled the effect.3PubMed Central. Effect of beetroot juice on lowering blood pressure in free-living, disease-free adults: a randomized, placebo-controlled trial So there does appear to be a dose-response relationship, at least up to a point.
For sustained use, a 15-day trial found that daily beetroot juice supplementation kept both systolic and diastolic blood pressure about 4% below baseline throughout the entire supplementation period, with plasma nitrite levels staying elevated the whole time.4PubMed. Acute and chronic effects of dietary nitrate supplementation on blood pressure and the physiological responses to moderate-intensity and incremental exercise The blood pressure reduction didn’t fade, which suggests the body doesn’t quickly develop tolerance to dietary nitrate.
In practical terms, researchers have developed a “Nitrate Veg-Table” to simplify dosing, with each “nitrate unit” equal to 1 mmol (62 mg) of nitrate. The general idea is to aim for a daily intake that provides measurable benefit without going overboard.5Proceedings of the Nutrition Society. Vascular effects of dietary nitrate (as found in green leafy vegetables and beetroot) via the nitrate-nitrite-nitric oxide pathway For most people, one cup of beetroot juice or its food equivalent daily lands squarely in the range that trials have tested.
Whole Beets, Juice, Powder, and Chips
Not everyone wants to drink beet juice every day, and different forms of beetroot deliver different amounts of the active compounds. A direct comparison of beetroot juice, chips, powder, and cooked beetroot found that juice had the highest nitrate content of all the preparations tested. It also had the highest total phenolic content. Chips and powder, on the other hand, scored higher for total antioxidant potential and organic acids.6PubMed Central. Comparison of total antioxidant potential, and total phenolic, nitrate, sugar, and organic acid contents in beetroot juice, chips, powder, and cooked beetroot So if your main goal is nitrate for blood pressure, juice is the most concentrated source. If you want a broader antioxidant profile, powders and chips have their own strengths.
Whole baked beets work too. In a study looking at running performance, participants consumed 200 grams of baked beetroot containing at least 500 mg of nitrate about 75 minutes before exercise.7PubMed. Whole beetroot consumption acutely improves running performance That’s roughly equivalent to two small-to-medium beets. The nitrate content was comparable to what juice-based studies use, and performance improved compared to a placebo. So you don’t need juice specifically; whole beets get the job done if you eat enough of them.
How you cook beets matters for nitrate retention. Boiling causes some nitrate to leach into the cooking water, reducing the vegetable’s nitrate content by roughly 4 to 13%.8PubMed Central. The nitrate content of fresh and cooked vegetables and their health-related risks That’s a modest loss, not a dealbreaker. Roasting or baking avoids the leaching issue entirely. Frying can actually concentrate nitrate because of water loss, though beets aren’t commonly fried. The bottom line: raw or roasted beets retain the most nitrate, and boiled beets still deliver plenty as long as you aren’t discarding a lot of cooking liquid.
Exercise Performance
Beyond blood pressure, beets have become popular among athletes. A systematic review of beetroot juice and cardiorespiratory endurance found that supplementation can improve performance at various distances, extend time to exhaustion at moderate intensities, and potentially improve performance near maximum effort.9PubMed Central. Effects of Beetroot Juice Supplementation on Cardiorespiratory Endurance in Athletes. A Systematic Review The mechanism ties back to the same nitric oxide pathway that lowers blood pressure: wider blood vessels mean more oxygen reaches muscles, and the oxygen cost of a given workload drops. Athletes essentially do the same work with less metabolic effort.
The performance research also highlights recovery benefits. Beetroot’s betalains, the pigments responsible for its deep red color, have antioxidant and anti-inflammatory properties that may help reduce muscle soreness after hard exercise.10Journal of Functional Foods. Beetroot boost: Unlocking the power of Beta Vulgaris for peak athletic performance – Section: Importance of Beta vulgaris (Beetroot) in sport science sector Most athletic studies use a dose similar to the blood-pressure research: about 250 to 500 mL of juice consumed one to three hours before exercise. Some athletes use “concentrated” or “shot” formats that pack the same nitrate into a smaller volume, typically 70 mL.
One caveat for competitive athletes: the performance gains are usually more noticeable in recreational or moderately trained individuals. Highly trained elite athletes sometimes show smaller or no measurable improvement, possibly because their bodies are already so efficient at delivering oxygen that the additional boost from dietary nitrate has less room to make a difference.
Brain and Cognitive Health
The nitric oxide produced from dietary nitrate doesn’t just go to your muscles. It also increases blood flow to the brain. A review focused on beetroot and Alzheimer’s disease noted that nitrate-rich beetroot can improve cerebral blood flow and vascular responsiveness, and that higher intakes of plant-derived nitrate are linked to reduced cognitive decline.11PubMed Central. Can Beetroot (Beta vulgaris) Support Brain Health? A Perspective Review on Alzheimer’s Disease This is still an emerging area of research, but the connection between vascular health and brain health is well established, and beets sit right at the intersection.
In a more controlled setting, a double-blind, placebo-controlled crossover study found that a single dose of dietary nitrate changed how blood flowed through the brain during mental tasks and improved performance on a demanding arithmetic task.12PubMed. Dietary nitrate modulates cerebral blood flow parameters and cognitive performance in humans: A double-blind, placebo-controlled, crossover investigation The researchers suggested this may be one mechanism by which vegetable consumption benefits brain function generally, not just through beets specifically. Still, beets deliver more nitrate per serving than most other vegetables, making them a particularly efficient source.
Cardiovascular Benefits Beyond Blood Pressure
Lowering blood pressure is the headline, but beets appear to improve the health of blood vessel walls directly. A meta-analysis of randomized controlled trials found that beetroot nitrate supplementation reduced arterial stiffness and improved endothelial function, meaning the inner lining of blood vessels became more responsive and flexible.13PubMed. The effect of beetroot inorganic nitrate supplementation on cardiovascular risk factors: A systematic review and meta-regression of randomized controlled trials Arterial stiffness is an independent predictor of heart disease, so improvements there matter even apart from the blood pressure numbers.
Beetroot juice also appears to help with the temporary dip in blood vessel function that happens after eating a fatty or mixed meal. In a crossover trial with overweight men, beetroot juice reduced the postprandial impairment of blood vessel dilation compared to a control drink.14Atherosclerosis. Effects of beetroot juice on postprandial endothelial function in overweight men: A randomised crossover trial After meals, blood vessels typically become less responsive for a few hours, and over years of repeated meals, that repeated stress contributes to cardiovascular risk. Having something in the diet that buffers that effect could add up over time.
When Beets Don’t Seem to Work
The research isn’t uniformly positive for every group. In people with type 2 diabetes, a two-week trial of daily beetroot juice delivering 7.5 mmol of nitrate per day raised plasma nitrite levels as expected, but did not lower blood pressure, improve blood vessel function, or improve insulin sensitivity.15PubMed. Effect of dietary nitrate on blood pressure, endothelial function, and insulin sensitivity in type 2 diabetes The nitrate was being absorbed and converted, but the downstream effects on blood pressure weren’t materializing. This may be because diabetes damages the pathways that respond to nitric oxide, meaning the signal gets through but the vessels can’t fully respond.
A separate trial in overweight older adults also found that beetroot juice did not lower blood pressure.16Proceedings of the Nutrition Society. Isometric handgrip exercise or beetroot juice does not lower blood pressure in overweight older adults: a randomised controlled trial These results are a useful reality check. Much of the most impressive blood pressure data comes from healthy, younger, or normotensive adults. If you already have high blood pressure from long-standing metabolic disease or significant arterial damage, beets alone are unlikely to be a substitute for medication. They may still offer other benefits like the antioxidant and anti-inflammatory effects of betalains, but the blood pressure headline won’t necessarily apply to everyone.
People already taking blood-pressure-lowering medications should also be cautious about stacking a very high beet intake on top of their prescriptions, as the combined effect could drop blood pressure too low. This isn’t common, but it’s worth mentioning to your doctor if you plan to drink beet juice daily.
The Anti-Inflammatory Side of Beets
Nitrate gets most of the attention, but beets contain another class of compounds that researchers are interested in: betalains. These are the red and yellow pigments that give beets their color. In laboratory and animal studies, betalain-rich extract from beetroot reduced swelling, neutrophil migration to inflamed tissue, and levels of pro-inflammatory signaling molecules like TNF-alpha and IL-1 beta, while increasing levels of the anti-inflammatory signal IL-10.17PubMed. Anti-inflammatory activity of betalain-rich dye of Beta vulgaris: effect on edema, leukocyte recruitment, superoxide anion and cytokine production This is preclinical data, meaning it hasn’t been proven to work the same way in humans at dietary doses. But it provides a plausible biological reason why beet consumption might help with inflammatory conditions over time, on top of whatever the nitrate is doing.
The combination of nitrate for vascular health and betalains for inflammation is part of what makes beets interesting to nutrition researchers. Most nitrate supplements don’t contain betalains, and most antioxidant-rich foods don’t deliver as much nitrate as beets. You get both in one package, which is hard to replicate with a single supplement.
Side Effects and Who Should Be Careful
The most visible side effect of eating beets is beeturia, the harmless reddish-pink discoloration of urine and sometimes stool. It happens because betalain pigments pass through the digestive system partly intact. It looks alarming if you aren’t expecting it, but it has no health consequences.
A more meaningful concern is oxalate content. Beetroot juice contains roughly 60 to 70 mg of total oxalate per 100 mL, which is high compared to most other juices.18Journal of Food Composition and Analysis. The oxalate content of fruit and vegetable juices, nectars and drinks Oxalates can bind with calcium in the kidneys to form calcium oxalate stones, which are the most common type of kidney stone. If you have a history of kidney stones or are at elevated risk, large daily servings of beet juice could increase that risk. The closely related silver beet (a leafy green from the same species) has been specifically flagged as a concern for stone-prone individuals because of very high soluble oxalate levels.19PubMed. Oxalate content of silver beet leaves (Beta vulgaris var. cicla) at different stages of maturation and the effect of cooking with different milk sources Red beetroot has lower oxalate than its leafy cousin, but it’s not negligible, especially if you are juicing several beets a day.
People on blood thinners should also be aware that the high vitamin K content in beet greens (the leaves, not the root) can interfere with medications like warfarin. The root itself is lower in vitamin K and is generally less of a concern, but eating large amounts of the entire plant could be relevant.
For otherwise healthy adults, one to two servings of beets or one cup of beet juice per day is well within what the research considers safe. The trials discussed above ran for up to 15 days with daily supplementation and reported no adverse effects beyond the cosmetic ones. Longer-term safety data from controlled trials is limited, but beets have been part of traditional diets for centuries without raising red flags.
Practical Tips for Getting the Most Out of Beets
Timing matters if you are using beets for a specific purpose. Blood pressure drops tend to peak around two to three hours after consumption, so if you are hoping for a pre-workout boost or a timed effect, plan accordingly. For general cardiovascular health, consistency matters more than timing, and daily consumption maintains the benefit without the body adapting away from it.
If you buy commercial beetroot juice or concentrated shots, check the label for actual nitrate content. Products vary widely depending on the beetroot variety, growing conditions, and processing methods. Some brands standardize their nitrate content and list it on the label; others don’t. A product marketed as “beetroot juice” but heavily diluted with apple juice or water will deliver less nitrate per serving.
For whole beets, roasting is the simplest way to preserve nitrate while making them palatable. Peel and dice them, toss with a little oil, and roast at a moderate temperature. You can also grate raw beets into salads. Blending raw beets into a smoothie with fruit is another option that keeps nitrate intake high. Adding citrus or vitamin C-rich fruits may help stabilize nitrite in the stomach, potentially improving conversion to nitric oxide, though this is more theoretical than proven.
If you dislike beets entirely, other nitrate-rich vegetables like arugula, spinach, and celery can help fill the gap, though you typically need a larger portion to match the nitrate density of beets. A handful of arugula and a cup of spinach together might get you into a similar range, but beets remain the single most concentrated common food source.
Beets and Medication Interactions
Beyond blood pressure drugs and blood thinners, beets are sometimes flagged for interaction with phosphodiesterase-5 inhibitors (drugs like sildenafil used for erectile dysfunction), which also work partly through the nitric oxide pathway. The theoretical concern is that combining a nitric-oxide-boosting food with a drug that amplifies the same signal could cause an excessive blood pressure drop. In practice, the amount of nitric oxide from dietary beets is much smaller than what a pharmaceutical nitrate like nitroglycerin produces, so the risk is low with normal food portions. Still, if you are taking any medication that affects blood pressure or nitric oxide signaling, a quick conversation with a pharmacist is reasonable before making beet juice a daily habit.
People on a low-sodium diet sometimes worry about beet juice’s sodium content. Commercial beet juice is generally low in sodium unless salt is added during processing. Check the nutrition label; plain beet juice or fresh-juiced beets should contain very little.