Beets are one of the most nutrient-dense root vegetables you can eat, with strong evidence behind their ability to lower blood pressure, improve exercise performance, and support brain health. Most of these benefits trace back to one compound: dietary nitrate, which your body converts into nitric oxide, a molecule that relaxes and widens blood vessels. But beets also deliver fiber, folate, potassium, and other compounds that benefit your liver, gut, and blood.
Blood Pressure
The best-studied benefit of beets is their effect on blood pressure. In a clinical trial published by the American Heart Association, people with high blood pressure who drank beetroot juice daily for four weeks saw their readings drop by about 8/4 mmHg in clinic measurements. Twenty-four-hour monitoring told a similar story, with reductions of roughly 8/5 mmHg. Those numbers held steady over the full four weeks with no sign of the body adapting and the effect wearing off.
The mechanism works like this: beets are rich in inorganic nitrate. After you swallow it, nitrate gets absorbed into your bloodstream, then cycled back into your mouth through your saliva glands. Bacteria on your tongue convert it to nitrite. When you swallow again, that nitrite enters your circulation and gets converted into nitric oxide, which relaxes blood vessel walls and lets blood flow more easily. It’s a surprisingly roundabout process, and it depends on the bacteria in your mouth, which is why some researchers note that antiseptic mouthwash can actually blunt the blood pressure benefit.
Exercise Performance
Athletes, particularly endurance athletes, have picked up on beetroot juice for good reason. The nitrate in beets makes your muscles more efficient at using oxygen. In controlled studies, beetroot juice reduced the amount of oxygen the body needed during moderate-intensity exercise and extended time to exhaustion by about 12 to 14 percent. That’s a meaningful edge for runners, cyclists, and swimmers working near their limits.
Interestingly, the benefit appears to come from more than just nitrate alone. When researchers compared beetroot juice to a nitrate salt supplement delivering the same dose, only the juice consistently improved performance. This suggests other compounds in beets, possibly antioxidants or polyphenols, work alongside nitrate to enhance the effect. Dose matters too: a study in the Journal of Applied Physiology found that a small 70 ml shot of concentrated beetroot juice didn’t change exercise responses, but 140 ml produced significant improvements. Doubling to 280 ml didn’t add further benefit, so there appears to be a ceiling.
Brain Health in Older Adults
The same nitric oxide pathway that lowers blood pressure also increases blood flow to the brain. This is especially relevant for older adults, whose cerebral blood flow naturally declines with age. In a recent study from the American Physiological Society, adults in their 60s and 70s with metabolic syndrome drank nitrate-rich beetroot juice daily for four weeks. Compared to a placebo group drinking nitrate-depleted juice, the beetroot group showed improved blood flow regulation in the frontal regions of the brain, areas involved in decision-making, planning, and working memory.
The researchers haven’t yet confirmed whether these blood flow improvements translate directly into better cognitive test scores. But the frontal lobe is one of the first brain regions affected by age-related decline, so finding a dietary intervention that specifically targets blood flow there is promising.
Liver Protection
Beets are a natural source of betaine, a compound that acts as a methyl donor in your liver. Betaine helps your liver process fat rather than store it, which is relevant to nonalcoholic fatty liver disease, a condition affecting roughly a quarter of the global population. Research published in Prostaglandins, Leukotrienes and Essential Fatty Acids found that betaine reduces fat accumulation in liver cells by boosting mitochondrial function, essentially helping liver cells burn fat more efficiently instead of letting it build up. It also has anti-inflammatory effects and appears to improve insulin resistance, both of which play into liver health.
Nutritional Profile
A 100-gram serving of raw beets (roughly two-thirds of a cup) provides 2.5 grams of fiber, 328 mg of potassium, and 100 micrograms of folate. That folate number is notable: it covers about 25% of the daily recommended intake in a single serving. Folate is essential for DNA repair, red blood cell production, and is critical during pregnancy for preventing neural tube defects.
Cooking changes the picture significantly. Boiled beets retain their fiber and potassium almost entirely, but folate drops from 100 micrograms to just 12. If you’re eating beets specifically for folate, raw or lightly roasted preparations preserve far more of it. Manganese, a mineral involved in bone health and metabolism, also decreases from 0.46 mg to 0.31 mg with cooking.
Gut Health
The fiber in beets feeds beneficial bacteria in your large intestine. A healthy population of gut bacteria supports immune function, helps regulate inflammation, and improves the consistency and regularity of bowel movements. At 2.5 grams of fiber per 100-gram serving, beets aren’t the most fiber-dense vegetable you can eat, but their fiber is paired with other bioactive compounds that contribute to a healthy gut environment. If constipation is a concern, adding beets to your regular diet is a simple way to move things along.
How Much to Eat
Most clinical studies showing health benefits use concentrated beetroot juice rather than whole beets, typically around 140 ml (about half a cup) of concentrated juice per day. That delivers roughly 8 to 9 millimoles of nitrate. You can get a comparable amount from about two medium whole beets, though nitrate content varies depending on the soil and growing conditions. If you’re using beetroot juice for exercise, drinking it two to three hours before activity gives nitric oxide levels time to peak.
For general health, there’s no strict threshold. Eating beets a few times a week as part of a varied diet gives you the fiber, folate, and betaine benefits without needing to track precise amounts.
Side Effects Worth Knowing
The most startling side effect of beets is completely harmless: beeturia, a reddish or pink color in your urine or stool. It happens because beets contain a pigment called betanin that some people can’t fully break down. Only about 10 to 14 percent of people experience it, but if you’re not expecting it, the color can easily be mistaken for blood. It typically clears within a day or two after you stop eating beets.
The more serious consideration is oxalates. Beets are classified as a very high-oxalate food, with about 76 mg per half cup. Oxalates bind to calcium and can contribute to kidney stone formation in susceptible people. If you’ve had calcium oxalate kidney stones before, you’ll want to limit beet intake or pair beets with calcium-rich foods, which binds the oxalate in your gut before it reaches your kidneys.