Drinking beetroot juice every day can lower your blood pressure, improve exercise endurance, and increase blood flow to your brain. The most well-documented effect is a drop in blood pressure of roughly 8/2 mmHg in people with hypertension, driven by the natural nitrates concentrated in beets. But daily consumption also comes with a few things worth knowing about, from high oxalate levels to surprisingly red urine.
How It Lowers Blood Pressure
Beetroot juice is one of the richest dietary sources of inorganic nitrate, and that nitrate is the reason behind most of the health effects. When you drink it, the nitrate gets absorbed through your upper intestine and enters your bloodstream. From there, your salivary glands pull it back into your mouth, where bacteria on your tongue convert it into a related compound called nitrite. Once you swallow that saliva, the nitrite circulates through your body, where enzymes convert it into nitric oxide, a molecule that relaxes and widens blood vessels.
This chain of events produces a measurable drop in blood pressure. In a sustained trial published by the American Heart Association, people with hypertension who consumed beetroot juice daily saw an average reduction of 7.7 mmHg in systolic pressure (the top number) and 2.4 mmHg in diastolic pressure (the bottom number). Another study found that a single 500 ml serving lowered blood pressure by as much as 10/4.8 mmHg within about three hours, with the systolic effect lasting a full 24 hours. For context, that kind of reduction is comparable to what some blood pressure medications achieve.
One important detail: this process depends on the bacteria living on your tongue. If you use antibacterial mouthwash regularly, you may be killing the very bacteria that convert nitrate to nitrite, which could blunt the blood pressure benefit.
Effects on Exercise Performance
The same nitric oxide that relaxes blood vessels also makes your muscles more efficient during exercise. When researchers tested different doses of concentrated beetroot juice, they found that moderate and higher doses reduced the amount of oxygen the body needed during steady-state exercise by up to 3%. In practical terms, your muscles do the same work while burning less fuel.
The performance payoff shows up most clearly in endurance. In severe-intensity exercise, beetroot juice extended time to exhaustion by 12 to 14% compared to a placebo. That’s a meaningful difference for runners, cyclists, or anyone doing sustained cardio. Interestingly, beetroot juice does not appear to increase your maximum oxygen capacity (VO2 max). Instead, it helps you use the oxygen you already take in more efficiently, so you last longer before hitting the wall.
Brain Blood Flow in Older Adults
Beyond muscles and blood vessels, daily beetroot juice appears to increase blood flow to the brain, particularly in the frontal lobe, the area involved in decision-making, attention, and working memory. Research has shown that even a single dose of beetroot juice, combined with a high-nitrate diet, increased regional blood flow in the brains of older adults within 24 hours. Other studies found that beetroot juice changed blood flow patterns in the prefrontal cortex during cognitive tasks, with some corresponding improvement in task performance.
This is especially relevant for older adults, since reduced blood flow to the frontal lobe is associated with cognitive decline. The mechanism is the same nitric oxide pathway that lowers blood pressure: wider blood vessels mean more blood reaches brain tissue that needs it.
Sugar and Calorie Content
Beetroot juice is naturally high in sugar, with roughly 42 grams of sugar per 100 grams of juice. An 8-ounce glass (about 240 ml) can contain a significant amount of natural sugar, comparable to many fruit juices. If you’re managing blood sugar or watching calorie intake, this matters. Most clinical trials use concentrated “shots” of beetroot juice (around 70 to 140 ml) rather than full glasses, which delivers the nitrate benefit with considerably less sugar. Concentrated beetroot juice supplements, widely available in small bottles, are a practical alternative if sugar is a concern.
Kidney Stones and Oxalate Risk
Beetroot juice contains between 60 and 70 mg of oxalate per 100 ml, making it one of the highest-oxalate beverages you can drink. For comparison, most other fruit and vegetable juices contain less than 10 mg per 100 ml. Oxalates bind with calcium in your body to form calcium oxalate, the mineral compound responsible for about 75% of all kidney stones.
A high dietary intake of oxalate can significantly increase how much oxalate your kidneys excrete, even in healthy people with no history of stones. Dietary oxalate may contribute up to 50% of the oxalate found in urine. If you’ve had calcium oxalate kidney stones before, or if you have a family history of them, drinking beetroot juice every day adds a meaningful amount of oxalate to your diet. This doesn’t mean it will definitely cause stones, but it raises your risk profile, especially if you’re also not drinking enough water or eating a low-calcium diet (calcium in food actually helps bind oxalate in the gut before it reaches your kidneys).
Pink Urine and Other Harmless Side Effects
If your urine turns pink or deep red after drinking beetroot juice, you’re experiencing beeturia. It looks alarming but is completely harmless. Only about 14% of the general population experiences it, so most daily drinkers will never notice it. The pigment responsible, called betanin, passes through the digestive system and into the urine in some people based on individual differences in gut absorption. Research suggests it may be related to iron status, with people experiencing “iron hunger” potentially absorbing more of the pigment. Beeturia is not a sign of blood in your urine or any underlying problem.
Your stools may also take on a reddish tint. Again, this is the pigment passing through and nothing to worry about, though it’s worth being aware of so you don’t mistake it for something more serious.
How Much to Drink and When
Most clinical trials showing blood pressure and exercise benefits used about 250 to 500 ml of beetroot juice per day, or concentrated shots containing the equivalent nitrate dose (roughly 6 to 13 mmol of nitrate). Concentrated shots in the range of 70 to 140 ml are the most practical option for daily use, keeping sugar intake low while delivering enough nitrate to produce measurable effects.
Blood pressure effects peak around two to three hours after drinking and can persist for up to 24 hours with regular daily consumption. If you’re using it for exercise, drinking your beetroot juice two to three hours before a workout aligns with that peak window. For general cardiovascular health, the timing matters less as long as you’re consistent.
Who Should Be Cautious
Because beetroot juice lowers blood pressure through a mechanism similar to nitrate medications, anyone already taking blood pressure drugs should be aware that the effects can stack. The combination isn’t inherently dangerous, but it could cause your blood pressure to drop lower than expected, leading to dizziness or lightheadedness.
People taking nitrate-based heart medications (commonly prescribed for chest pain) should be particularly careful. These drugs work through the same nitric oxide pathway as beetroot juice, and combining the two intensifies the blood pressure drop. The concern is similar to the well-known warning about combining nitrate heart medications with erectile dysfunction drugs: the overlapping mechanisms can cause a sudden, significant drop in blood pressure. If you’re on any medication for blood pressure or heart conditions, it’s worth discussing daily beetroot juice with your prescriber so they can adjust doses if needed.