Beetroot lowers blood pressure, improves exercise endurance, and supports brain health, largely thanks to its unusually high concentration of dietary nitrate. A single root also packs meaningful amounts of folate, potassium, and fiber, making it one of the more nutrient-dense vegetables you can eat. Here’s what happens in your body when you eat it regularly.
How Beetroot Works in Your Body
Most of beetroot’s headline benefits trace back to one compound: dietary nitrate. When you eat beets, the nitrate travels to your mouth, where bacteria on your tongue convert it into a related molecule called nitrite. That nitrite then enters your bloodstream and gets converted again into nitric oxide, a gas that relaxes and widens blood vessels. This three-step process, sometimes called the enterosalivary pathway, is the engine behind beetroot’s effects on blood pressure, exercise performance, and brain function.
This is worth knowing because anything that disrupts those oral bacteria (like antibacterial mouthwash) can blunt the benefits. Your mouth bacteria are doing essential work here.
Blood Pressure and Heart Health
Beetroot’s effect on blood pressure is one of its most studied and consistent benefits. Across multiple trials using nitrate-rich diets (often including beetroot juice), systolic blood pressure drops by roughly 4 to 5 mmHg and diastolic pressure drops by about 2 mmHg. That may sound modest, but reductions in that range are clinically meaningful. At a population level, a 5-point drop in systolic pressure is associated with significant reductions in stroke and heart attack risk.
The effective dose in these studies typically falls between 5 and 10 mmol of nitrate per day, an amount you can realistically get from food. About 250 ml (one cup) of beetroot juice or two medium beets will put you in that range.
Exercise Performance and Endurance
Beetroot juice has become a staple supplement for endurance athletes, and the research supports it. At moderate doses, beetroot juice increased time to exhaustion by about 14% in controlled tests. Higher doses produced a similar boost of around 12%. Low doses, however, didn’t move the needle, so quantity matters.
The mechanism is straightforward: nitric oxide makes your muscles more efficient. Compared to other nitrate sources, beetroot juice reduced oxygen consumption during exercise by 4%, meaning your body does the same work with less effort. For a runner or cyclist, that translates to going longer before fatigue sets in.
Timing matters too. The studies showing performance gains had participants drink beetroot juice about two and a half hours before exercise, which aligns with how long it takes for nitrate levels to peak in your blood. If you’re using it before a workout or race, that’s the window to aim for.
Brain Health and Blood Flow
Your brain is highly sensitive to blood flow, and beetroot appears to improve it in targeted ways. A high-nitrate diet supplemented with beetroot juice increased blood flow specifically to the frontal white matter of the brain, the region involved in decision-making, attention, and working memory. Notably, this wasn’t a generalized increase in blood flow everywhere. It was concentrated along the neural tracts that connect areas responsible for executive function.
Longer-term data is emerging too. In one large aging study, each additional 60 mg per day of plant-based nitrate at baseline was associated with better cognitive outcomes over 10.5 years, including higher scores on memory recall and recognition tests. This was especially pronounced in people at elevated genetic risk for Alzheimer’s disease. While beetroot alone isn’t a guarantee against cognitive decline, it’s one of the richest dietary sources of the nitrate driving these findings.
Liver Protection
Beetroot contains betaine, a compound that acts as a methyl group donor in liver metabolism. In practical terms, betaine helps the liver process fats efficiently and discourages fat from accumulating in liver tissue. This hepatoprotective effect has drawn attention in the context of non-alcoholic fatty liver disease, where excess fat buildup in the liver can progress to inflammation and scarring. Betaine from beets supports the chemical reactions the liver uses to break down and export fat rather than store it.
Gut Health
Beetroot is a good source of dietary fiber and polyphenols, both of which feed the bacteria in your gut. In fermentation studies simulating the human gut, beetroot powder consistently increased populations of Bacteroides and Bifidobacterium, two bacterial groups associated with healthy digestion and immune function. The effect varied depending on a person’s existing gut composition, but the increase in Bifidobacterium was observed across all gut types tested.
Beetroot also boosted production of short-chain fatty acids, the compounds your gut bacteria produce when they digest fiber. These fatty acids fuel the cells lining your colon and play a role in reducing inflammation throughout the body.
What’s in a Beet: Nutritional Profile
Per 100 grams of raw beetroot (roughly one small beet), you get 328 mg of potassium, 100 micrograms of folate, and 0.46 mg of manganese. That folate content is particularly notable: 100 grams delivers about 25% of the daily recommended intake, making beets one of the better vegetable sources. Folate is essential for cell division and is especially important during pregnancy.
Beets also contain betalains, the pigments responsible for their deep red-purple color. These pigments act as antioxidants and are the reason beetroot stains everything it touches, including, occasionally, your urine.
The Red Urine Question
If you’ve ever eaten beets and noticed red or pink urine a few hours later, you’re not alone, but you’re in the minority. Only about 10% to 14% of people experience this, a harmless phenomenon called beeturia. It happens because some people can’t fully break down betanin, the red pigment in beets, so it passes through and shows up in urine or stool. It’s not a sign of anything wrong. If you’ve never eaten beets before and see red in the toilet, just remember what you had for dinner before worrying.
Who Should Be Cautious
Beets are high in oxalates, compounds that bind with calcium to form crystals. Beetroot juice contains 60 to 70 mg of oxalate per 100 ml, which is dramatically higher than almost any other fruit or vegetable juice (most fall below 10 mg per 100 ml). Since roughly 75% of kidney stones are made of calcium oxalate, anyone with a history of kidney stones should be careful about drinking large amounts of beetroot juice. Even 500 ml per day can meaningfully increase your oxalate load and urinary oxalate excretion.
For people without kidney stone risk, the oxalate content of normal dietary amounts of beets isn’t a concern. But if you’re juicing beets daily for the blood pressure or exercise benefits, it’s worth being aware of the tradeoff, especially if you have any history of stones or are prone to them.