Beetroot and Nitric Oxide: Supplements for Endurance
Key takeaways
- Beetroot is rich in dietary nitrates, which the body converts into nitric oxide, a molecule that widens blood vessels.
- This can modestly improve endurance performance and help lower blood pressure.
- The benefits are most noticeable in recreational athletes and are smaller in highly trained ones.
- Timing matters, with benefits typically seen when taken a few hours before exercise.
- It is generally safe, and the red tint it can give urine or stool is harmless.
Beetroot has earned a reputation as a natural performance booster, and unlike many sports supplements, it has genuine science behind it. The secret is its high content of dietary nitrates, which your body turns into nitric oxide, a molecule with real effects on blood flow.
That said, the benefits are modest and depend on how and when you use it. This guide explains how beetroot works, what it can realistically do for endurance and blood pressure, and how to get the most from it without overhyping the results.
How strong is the evidence
Beetroot and dietary nitrates are among the better studied performance aids. Here is a plain read on the evidence.
Common myths, cleared up
Beetroot gives a big, instant performance boost.
The benefits are modest and depend on timing, typically a few hours before exercise. It is a small edge, not a dramatic transformation.
Red urine after eating beets is dangerous.
It is a harmless and common effect of beetroot pigments passing through the body, not a sign of a problem.
More beetroot is always better.
There is a useful dose range, and taking very large amounts does not keep adding benefit. Sensible dosing is enough.
What beetroot and nitric oxide are
Beetroot is a root vegetable that happens to be one of the richest dietary sources of nitrates. These nitrates are the active ingredient behind its performance and cardiovascular effects, and they are also found in leafy greens like spinach and arugula.
Nitric oxide is a molecule the body produces that signals blood vessels to relax and widen, improving blood flow. By supplying nitrates that the body converts into nitric oxide, beetroot supports this process, which is the basis for its benefits.
How it works
The process runs in steps. You consume nitrates from beetroot, bacteria in your mouth and body help convert them into related compounds, and ultimately into nitric oxide. That nitric oxide widens blood vessels, improving blood flow and, during exercise, the delivery of oxygen to working muscles.
This improved efficiency is thought to be why beetroot can help endurance, letting you sustain effort a little longer or at a slightly lower oxygen cost. The same blood vessel widening effect also explains its modest blood pressure lowering.
What the research shows
Beetroot has reasonable evidence for two things. For endurance performance, studies suggest it can modestly improve time to exhaustion or efficiency, particularly in recreational athletes. For blood pressure, dietary nitrates have been shown to produce small reductions, which is relevant for heart health.
The effects are real but modest, and they are more pronounced in less trained individuals than in elite athletes, whose bodies are already highly efficient. Beetroot is a legitimate, evidence supported aid, but it offers a small edge rather than a dramatic boost.
Who benefits most
The people most likely to notice a benefit are recreational and moderately trained endurance athletes, such as runners and cyclists, where there is more room for improvement. Highly trained elite athletes tend to see smaller effects.
For general health, the blood pressure benefit of dietary nitrates applies more broadly, and eating nitrate rich vegetables like beetroot and leafy greens is a healthy habit regardless of athletic goals. So beetroot has value both as a mild performance aid and as part of a heart healthy diet.
How to use it
Beetroot is used as juice, concentrated shots, or powder, with concentrated nitrate shots being popular for a reliable dose. Research generally finds benefits when it is taken a few hours before exercise, giving the body time to convert the nitrates into nitric oxide, so last minute use is less effective.
Consistent use in the days leading up to an event may also help. There is a sensible dose range, and taking far more than that does not keep improving results, so following product guidance is wise rather than overdoing it.
Safety
Beetroot and dietary nitrates are generally very safe as food, and beetroot is simply a vegetable. The most notable effect is harmless: beetroot pigments can give urine or stool a reddish or pink tint, which surprises people but is not a cause for concern.
Two practical notes: strong antibacterial mouthwash can interfere with the conversion of nitrates by killing the helpful bacteria in your mouth, blunting the effect, and people on blood pressure medication should check with a clinician, since the added blood pressure lowering could be significant. Otherwise, it is a low risk, whole food based option.
How to get the most from beetroot
- Take beetroot juice or a concentrated nitrate shot a few hours before exercise.
- Consider consistent use in the days leading up to an event for endurance goals.
- Stick to a sensible dose rather than assuming more is better.
- Avoid strong antibacterial mouthwash around the time you use it, since it can blunt the effect.
- Do not be alarmed by a harmless reddish tint to urine or stool.
Beetroot for blood pressure and heart health
Beetroot effect on blood pressure is one of its better supported benefits and matters beyond sport. The dietary nitrates in beetroot convert to nitric oxide, which relaxes and widens blood vessels, and studies have shown this can produce small but real reductions in blood pressure. For heart health, even modest blood pressure improvements are worthwhile at a population level.
This benefit is not unique to beets. Leafy green vegetables such as spinach, arugula, and lettuce are also rich in nitrates and contribute the same way. So while beetroot gets the attention, the broader message is that a diet rich in nitrate containing vegetables supports healthy blood pressure and blood vessels, which is a good reason to eat plenty of them regardless of athletic goals.
Beetroot for everyday health, not just athletes
Beetroot is marketed heavily to athletes, but its cardiovascular benefits are relevant to almost everyone. The same blood vessel widening that helps an endurance athlete muscles get oxygen also supports healthy circulation and blood pressure in a non athlete. You do not need to be training for a race to benefit from nitrate rich foods.
Framed as part of a healthy diet rather than a sports supplement, beetroot and other nitrate rich vegetables are simply a nutritious, heart friendly choice. For general health, eating these vegetables regularly is the sensible approach, with concentrated juices or shots reserved for those specifically chasing an endurance edge. Either way, the underlying nutrition is the same wholesome thing.
Beetroot juice, powder, and whole beets
Beetroot comes in several forms, and they differ mainly in convenience and nitrate concentration. Concentrated beetroot juice and dedicated nitrate shots deliver a reliable, measured dose, which is why athletes favor them when timing matters. Beetroot powder is convenient and shelf stable, while whole cooked or roasted beets are a whole food option that provides nitrates along with fiber and other nutrients.
For a targeted performance dose, a concentrated shot is the most dependable. For general health, whole beets and other nitrate rich vegetables are excellent, though it is worth being mindful of the sugar in some juices if you drink a lot of them. All forms provide the beneficial nitrates; the right one depends on whether you want a precise dose or simply a healthy, everyday source.
Frequently asked questions
Does beetroot improve performance?
It has moderate evidence for modestly improving endurance, especially in recreational athletes. The benefit is a small edge rather than a dramatic boost, and it is smaller in highly trained athletes.
Does beetroot lower blood pressure?
Yes, dietary nitrates from beetroot have been shown to produce small reductions in blood pressure, which is relevant for heart health. People on blood pressure medication should check with a clinician first.
When should I take beetroot before exercise?
Research generally finds benefits when it is taken a few hours before exercise, allowing time for the body to convert nitrates into nitric oxide. Last minute use is less effective.
Why is my urine red after eating beets?
Beetroot pigments can give urine or stool a reddish or pink tint as they pass through the body. It is harmless and common, not a sign of a problem.
Should I use juice, shots, or powder?
All can work. Concentrated nitrate shots offer a reliable, consistent dose, while juice and powder are also effective. Follow the product guidance for dosing and timing.
Does beetroot lower blood pressure?
Yes, modestly. The dietary nitrates in beetroot convert to nitric oxide, which relaxes blood vessels, and studies show small but real reductions in blood pressure. This benefit is not unique to beets; leafy greens like spinach and arugula are also nitrate rich.
Do I need to be an athlete to benefit from beetroot?
No. The same blood vessel widening that helps athletes supports healthy circulation and blood pressure in anyone. Beetroot and other nitrate rich vegetables are a nutritious, heart friendly choice as part of a normal diet, not just a sports supplement.
Is beetroot juice better than eating whole beets?
For a precise performance dose, concentrated juice or nitrate shots are the most reliable. For general health, whole beets and other nitrate rich vegetables are excellent and add fiber and nutrients. Be mindful of sugar in some juices. All forms provide the beneficial nitrates.
This article is for general education and is not medical advice. Talk with a clinician before using nitrate supplements, especially if you take blood pressure medication.
