What beets actually are and what they contain
Beets are a root vegetable with a deep red or golden color, and they contain compounds that researchers have studied for their effects on the body. The main ones are betalains (the pigments that make them red), nitrates (which your body converts to nitric oxide), and fiber. A cup of cooked beets has about 37 calories, 2 grams of fiber, and small amounts of folate, manganese, and potassium.
When you eat beets, your digestive system breaks down these compounds. The nitrates travel through your bloodstream and affect how your blood vessels work. The fiber moves through your digestive tract largely unchanged, which is where some of the digestive effects come from. The betalains are antioxidants, meaning they can neutralize certain molecules in your body that accumulate over time.
Beet juice is more concentrated than whole beets — a small glass contains the nitrates and betalains from several whole beets in one serving. This matters because most research on beets has used juice rather than whole beets, so the effects are often stronger in studies than what you would get from eating a single beet at dinner.
Key Takeaways
- Beets contain nitrates that your body converts to nitric oxide, which affects blood vessel function and blood pressure.
- The fiber in beets can support digestive health, though whole beets have less concentrated effect than beet juice.
- Betalains, the red pigments in beets, are antioxidants that may reduce inflammation, though human research is still limited.
- Most research on beets has used juice or concentrated forms, so whole beets may have milder effects than study results suggest.
- Beets are low in calories and contain folate and other minerals, making them a nutrient-dense vegetable choice.
How beets may affect blood pressure and blood flow
The nitrates in beets are the reason most people study them. Your body converts dietary nitrates into nitric oxide, a molecule that relaxes blood vessel walls and allows blood to flow more easily. This process can lower blood pressure, which is why beets appear in research on cardiovascular health.
Studies on beet juice have shown measurable drops in blood pressure within hours of drinking it, though the effect is usually temporary — it peaks and then returns toward baseline over several hours. Whole beets produce a smaller effect because you consume fewer nitrates. The effect is most noticeable in people who already have elevated blood pressure; people with normal blood pressure see less dramatic changes.
This same mechanism — improved blood flow — is why some athletes drink beet juice before exercise. Better blood flow can mean more oxygen delivery to muscles, which theoretically improves endurance performance. Research shows modest improvements in time-to-exhaustion in some endurance sports, though the effect is small and not universal across all types of exercise.
Beets and digestive health
One cup of cooked beets contains about 2 grams of fiber, which is a moderate amount. Fiber moves through your digestive system largely undigested and adds bulk to stool, which can support regular bowel movements. For people who do not eat enough fiber overall, adding beets can contribute to better digestive function.
Beets also contain compounds called oligosaccharides, which are fermented by bacteria in your colon. This fermentation can produce gas, which is why some people experience bloating or digestive discomfort after eating beets — especially if they eat a large amount or are not used to high-fiber foods. This is not harmful, but it is worth knowing about if you plan to eat beets regularly.
The fiber and fermentable compounds in beets may also support the growth of beneficial bacteria in your gut, though research on this is still developing. Most of what we know comes from studies on fiber in general rather than beets specifically.
Antioxidants and inflammation
Betalains are the red and yellow pigments in beets, and they function as antioxidants in your body. Antioxidants neutralize molecules called free radicals, which accumulate from normal metabolism and from exposure to things like sunlight and pollution. Over time, free radical accumulation is thought to contribute to aging and chronic disease.
In laboratory and animal studies, betalains show anti-inflammatory effects — they reduce markers of inflammation in cells and tissues. However, human research is much more limited. A few small studies suggest that beet juice may lower some inflammation markers in people with certain conditions, but the evidence is not strong enough to say that eating beets will reduce inflammation in a typical person.
The antioxidant content of beets is real, but it is also modest compared to other vegetables. Beets are not uniquely powerful as antioxidant sources — many other vegetables and fruits contain similar or higher levels of antioxidant compounds.
Beets and blood sugar
Beets contain natural sugars, which is why they taste sweet. One cup of cooked beets has about 13 grams of carbohydrates, roughly 9 of which are sugar. However, beets also contain fiber, which slows the rate at which your body absorbs those sugars. This means beets have a moderate glycemic index — they raise blood sugar, but not as quickly as white bread or juice would.
For people managing diabetes or prediabetes, beets can be part of a balanced diet, but they should be eaten in reasonable portions and ideally paired with protein or fat, which further slows sugar absorption. Beet juice, which lacks the fiber of whole beets, raises blood sugar more quickly and is less suitable for people with blood sugar concerns.
Potential downsides and who should be cautious
Beets are safe for most people, but a few groups should be aware of considerations. People with kidney disease may need to limit beets because they contain oxalates, compounds that can contribute to kidney stone formation in susceptible people. If you have a history of kidney stones, ask your doctor whether beets are appropriate for you.
Beet juice can interact with certain blood pressure medications, potentially making them work too strongly. If you take blood pressure medication and plan to drink beet juice regularly, mention it to your doctor. Whole beets are less concentrated and less likely to cause problems, but the conversation is still worth having.
Some people experience beeturia — a harmless condition where beet pigments turn urine red or pink. This is not dangerous and does not mean anything is wrong; it straightforward means your body did not fully break down the betalains. It is more common in people with iron deficiency or certain genetic variations.
How to eat beets and how much to consume
Whole beets can be roasted, boiled, steamed, or eaten raw in salads. Roasting brings out their natural sweetness. One medium beet or about one cup of cooked beets is a standard serving. There is no official recommendation for how much beet to eat daily, but one serving a few times a week is a reasonable amount for most people.
Beet juice is more concentrated, and most research uses 500 milliliters (about 17 ounces) per day. If you want to try beet juice for its potential effects on blood pressure or exercise performance, that is a typical amount, though you should start smaller to see how your digestive system responds.
Beets pair well with other vegetables, grains, and proteins. Pairing them with fat — like olive oil, nuts, or cheese — helps your body absorb the fat-soluble compounds in beets and also slows sugar absorption. Beets are inexpensive and available year-round in most places, making them an accessible vegetable to experiment with.
Frequently Asked Questions
Do I need to eat beets every day to see health effects?
No. Most research shows effects from single doses or occasional consumption. For blood pressure effects, a dose of beet juice shows measurable changes within hours. For long-term health, eating beets a few times a week as part of a varied diet is sufficient. Consistency matters more than daily consumption.
Is beet juice better than whole beets?
Beet juice is more concentrated, so it delivers more nitrates and betalains per serving. However, whole beets contain fiber that juice lacks, and fiber supports digestive health. Whole beets are also less likely to cause blood sugar spikes. Choose based on your goal: juice for potential blood pressure effects, whole beets for digestive support and a more balanced nutrient profile.
Can beets help with weight loss?
Beets are low in calories and high in fiber, which can support satiety — the feeling of fullness. However, no food causes weight loss on its own. Beets can be part of a balanced diet that supports weight management, but they are not a weight loss tool by themselves.
Are canned or pickled beets as healthy as fresh beets?
Canned beets retain most of their nitrates and betalains, so they are nutritionally similar to fresh beets. Pickled beets are also fine, though they often contain added sodium and sugar. Check the label and rinse canned beets if you want to reduce sodium. Frozen beets are also a good option and are often less expensive than fresh.
Will eating beets turn my urine red?
It may. This is called beeturia and happens when your body does not fully break down beet pigments. It is harmless and more common in people with iron deficiency or certain genetic traits. If it happens, it straightforward means the pigments passed through your system largely unchanged — it does not indicate a problem.