What Does Beet Juice Do for Your Body? | Nitrate Benefits

Beet juice may lower blood pressure and modestly improve exercise performance in some people.

For the full breakdown, see our best Beet Juice For High Blood Pressure guide.

The active ingredient is dietary nitrate, which your body converts into nitric oxide—a molecule that relaxes blood vessels and improves blood flow. The evidence for blood pressure reduction is the strongest; exercise benefits are real but more variable.

How Does Beet Juice Lower Blood Pressure?

Beet juice lowers blood pressure through its high nitrate content. When you drink it, your body converts that nitrate into nitric oxide, which signals blood vessels to relax and widen, reducing arterial resistance and lowering both systolic and diastolic pressure.

The effect is most pronounced in people with elevated readings. A 2018 review reported systolic reductions of about 2–4 mmHg in normal blood pressure, but a more meaningful 4–11 mmHg in those with hypertension. Harvard Health notes beet juice is one of the more consistent dietary approaches to controlling blood pressure, framing it as a nutritional strategy rather than a treatment.

One caveat: most research uses concentrated beetroot juice or supplements, not cooked beets or mixed vegetable juices. The dose matters, and a glass of diluted beet blend may not deliver the same nitrate load as studied products.

Can Beet Juice Improve Exercise Performance?

Beet juice can modestly improve endurance and reduce the oxygen cost of exercise, but the effect is inconsistent. The nitric oxide boost improves blood flow to working muscles and may make them more efficient at using oxygen. Some studies show clear endurance gains; others show little to no difference.

That sounds contradictory, but reflects reality: measurable improvement, yet small enough that it matters most in elite competition where fractions of a percent decide races. For recreational athletes, the practical benefit is likely minor.

When supplementation helps, timing matters. Studies typically use either an acute dose 2–3 hours before exercise or daily supplementation for at least three days. Performance research generally targets nitrate intakes of 8.3–16.4 mmol per day, roughly 515–1017 mg of nitrate—more than you get from a single glass of most commercial juices.

Are There Other Benefits or Risks To Know?

Beyond blood pressure and exercise, reviews mention possible effects on endothelial function, inflammation, and cardiovascular risk markers. These are plausible—all stemming from the same nitric oxide pathway—but less settled than the blood pressure data, and no long-term trials have established whether sustained daily use is safe or beneficial.

Several groups should be cautious. If you have low blood pressure, take blood pressure medication, use nitrate heart drugs like nitroglycerin, or take PDE-5 inhibitors such as sildenafil or tadalafil, the added vasodilation could drop your pressure too far—talk to a doctor first. People with a history of calcium oxalate kidney stones should also be careful, since beets are high in oxalates.

One harmless surprise: pink or red urine and stools after eating beets is normal pigment discoloration, not blood. Called beeturia, it affects roughly 10–14% of people.

What To Look For In A Beet Juice Product

Not all beet products are equal. For research-backed effects, look for concentrated beetroot juice or shots rather than diluted blends with other fruit juices. Check the label for how much actual beet or beetroot juice concentrate is in each serving, not just total juice volume.

If you’re comparing options for blood pressure support specifically, our tested roundup of beet juice for high blood pressure breaks down which products actually deliver a research-aligned nitrate dose and which ones fall short on concentration or added sugar.

One pattern to watch: studies refer to beetroot juice itself, not cooked beets or powders at arbitrary doses. Whole roasted beets are healthy, but you’d need to eat several to match the nitrate concentration in a single study shot.

Practical guidance: a daily 70–140 ml shot of concentrated beet juice is the most common studied range. Start with a smaller serving to check tolerance, take it consistently for at least a few days before judging effects, and don’t stop any prescribed blood pressure medication based on beet juice alone—the research supports it as a complement, not a replacement.