What beets actually do in your body

Beets are a root vegetable packed with compounds that your body uses in specific ways. The most talked-about substance in beets is betalain, a pigment that gives them their deep red or purple color. Your body doesn't store betalains the way it stores some other nutrients, but they act as antioxidants while they're in your system—meaning they help neutralize molecules that can damage your cells.

Beets also contain nitrates, which your body converts into nitric oxide. Nitric oxide relaxes blood vessel walls, which can lower blood pressure and improve how blood flows to your muscles and organs. This is why you'll often hear about beets in the context of athletic performance or heart health. The effect is real enough that some athletes drink beet juice before workouts, though the benefit is modest and varies from person to person.

Beyond those two, beets deliver fiber (which supports digestion), folate (a B vitamin your body needs for cell division), and manganese (which helps with bone health and metabolism). A cup of cooked beets has about 3 grams of fiber and meaningful amounts of folate, but you're not getting anything from beets that you couldn't get from other vegetables—beets are just one option among many.

Key Takeaways

  • Beets contain betalains and nitrates, compounds that work as antioxidants and may help lower blood pressure by improving blood flow.
  • The nitrate effect is real but modest; you won't see dramatic changes from eating beets alone, and the benefit varies between people.
  • Beets are a good source of fiber and folate, but these nutrients are common in many other vegetables and whole foods.
  • Raw beets, cooked beets, and beet juice all contain these compounds, though juice concentrates them and lacks the fiber of whole beets.
  • People with kidney stones or certain kidney conditions should check with their doctor before eating large amounts of beets, since beets are high in oxalates.

How beets affect blood pressure and circulation

The nitrate pathway is where most of the research on beets focuses. When you eat beets, your digestive system breaks down the nitrates, and your body converts them to nitric oxide. This compound tells your blood vessels to relax and widen, which reduces the pressure inside them. Studies have found that people who drink beet juice or eat beets show small but measurable drops in blood pressure—usually in the range of 3 to 10 millimeters of mercury, depending on the study.

That's a real effect, but it's not a replacement for blood pressure medication. If you have high blood pressure, beets are worth including in your diet as part of a broader pattern of eating vegetables, but they're not a treatment on their own. The effect also takes time—you don't get an when ready drop after one meal. Most studies look at people eating beets regularly over weeks or months.

For athletes, the nitrate effect is why some people consume beet juice before training. The theory is that better blood flow means your muscles get more oxygen, which could improve endurance performance. Research shows a small benefit for endurance sports (like running or cycling), but the effect is inconsistent and tends to be larger in people who aren't already highly trained.

Beets and digestion

A cup of cooked beets contains about 3 grams of fiber, which is a moderate amount. Fiber is important because it feeds the bacteria in your gut, helps move food through your digestive system, and can prevent constipation. However, 3 grams is not a large amount—a cup of beans or a serving of whole-grain bread has more.

Beets also contain a compound called betaine, which is different from betalain. Betaine may support liver function and digestion, though the research is still developing. Some people report that beets have a mild laxative effect, which is probably due to the fiber and the way your gut bacteria respond to betalains. If you're not used to eating beets, starting with a smaller portion can help your digestive system adjust.

Beet juice versus whole beets

Beet juice concentrates the nutrients and compounds from multiple beets into a smaller volume, so you get more nitrates and betalains per ounce. This is why athletes and people researching blood pressure effects often use juice rather than whole beets. A typical serving of beet juice is 2 to 4 ounces, which is much easier to consume than eating several whole beets.

The trade-off is that juice removes the fiber. Whole beets give you the full package—fiber, nitrates, betalains, and other nutrients—while juice gives you the compounds but not the bulk that helps your digestion. If you're drinking beet juice, you're making a choice to concentrate certain compounds at the expense of fiber. Neither is wrong; it depends on what you're trying to do.

Beet juice also tends to be higher in natural sugars because the fiber is removed. A cup of beet juice has roughly 12 grams of sugar, while a cup of cooked whole beets has about 13 grams of sugar but also 3 grams of fiber, which slows how quickly your body absorbs that sugar. If you're managing blood sugar, whole beets are the better choice.

Who should be cautious with beets

Beets are high in oxalates, compounds that can bind to calcium in your body. For most people, this isn't a problem. But if you have a history of kidney stones or certain kidney conditions, eating large amounts of beets may increase your risk. This doesn't mean you have to avoid beets entirely, but it's worth discussing with your doctor if you have kidney concerns.

People taking blood-thinning medications should also check with their doctor before making beets a regular part of their diet, since the nitrates can interact with how those medications work. This is not a reason to avoid beets, but it's a conversation worth having with your healthcare provider if you're on medications like warfarin.

Beet juice can also temporarily stain your urine or stool a dark red or purple color, which is harmless but can be startling if you're not expecting it. This is a normal response and doesn't indicate a problem.

How to include beets in your diet

Beets work in salads, roasted as a side dish, blended into smoothies, or juiced. Roasting brings out their natural sweetness and makes them easier to eat in larger quantities. If you're new to beets, starting with roasted beets in a salad is a gentler introduction than juice, since you get the fiber and the nutrients without the concentrated sugar and oxalates.

If you're interested in the blood pressure or athletic performance effects, consistency matters more than the form. Eating beets a few times a week is more useful than eating a large amount once. The compounds in beets don't build up in your system, so the benefit comes from regular intake.

Frequently Asked Questions

Do I need to eat beets to be healthy?

No. Beets are one vegetable among many, and they don't contain nutrients you can't get elsewhere. Carrots, spinach, broccoli, and dozens of other vegetables offer similar or overlapping benefits. Beets are worth eating if you like them, but they're not essential.

How much beet juice should I drink to lower my blood pressure?

Most studies use 2 to 4 ounces of beet juice daily, but the effect is small and varies between people. Beet juice is not a substitute for blood pressure medication. If you're interested in trying it, talk to your doctor first, especially if you take blood-thinning drugs.

Can beets help me run faster or have more endurance?

Beet juice may provide a small boost to endurance performance, but the effect is modest and most noticeable in people who aren't already highly trained. It's not a substitute for training. If you want to try it, drink 2 to 4 ounces of beet juice about 2 to 3 hours before exercise.

Are canned or pickled beets as good as fresh?

Canned beets retain most of their betalains and nitrates, so they're nutritionally similar to fresh. Pickled beets may have added sugar and salt, so check the label. The main difference is that canned beets are already cooked, so they're convenient, while fresh beets require preparation.

What does it mean if my urine turns red after eating beets?

This is a normal response called "beeturia" and happens because your body can't break down all the betalain pigment. It's harmless and temporary. Not everyone experiences it—it depends on your individual digestion and gut bacteria.