Beetroot
Beta vulgaris
A dietary nitrate-rich root vegetable popular as a natural performance and blood-pressure aid. One of the better-supported food-based supplements for exercise endurance and vascular health.
What is Beetroot?
Beetroot is the taproot of the beet plant, Beta vulgaris, a deep-red vegetable rich in inorganic nitrate, antioxidant betalain pigments, folate, and potassium. While long valued as a nutritious food, beetroot — especially as concentrated juice or powder — has become one of the most studied natural ergogenic (performance-enhancing) and cardiovascular supplements, owing to its high dietary nitrate content.
Known Health Benefits
How It Works
Beetroot's primary active component is inorganic nitrate. After ingestion, oral bacteria reduce nitrate to nitrite, which is then converted in the body to nitric oxide (NO), a signaling molecule that relaxes and widens blood vessels (vasodilation). This lowers blood pressure and improves blood flow to muscles and the brain. During exercise, elevated NO reduces the oxygen cost of muscle contraction and improves mitochondrial efficiency, allowing athletes to sustain effort longer. Betalain pigments contribute antioxidant and anti-inflammatory effects, and folate supports cardiovascular and methylation pathways.
What Research Says
Beetroot has unusually strong evidence for a food-based supplement. Multiple meta-analyses confirm that dietary nitrate from beetroot juice significantly lowers systolic blood pressure, with reductions of roughly 3–5 mmHg. In sports science, a large body of randomized trials and reviews shows that beetroot juice improves time-to-exhaustion and exercise economy, particularly in recreational and endurance athletes; the seminal work by Bailey et al. (2009) demonstrated reduced oxygen cost of submaximal exercise. Evidence is most consistent at nitrate doses of 300–600 mg taken 2–3 hours before activity.
Active Compounds
Dietary nitrate, betalains (betanin), folate, potassium
Forms & Bioavailability
Nitrate is rapidly and almost completely absorbed in the upper gut, with plasma nitrite peaking around 2–3 hours after ingestion — which is why timing supplementation before exercise matters. Importantly, the nitrate-to-nitrite conversion depends on oral bacteria, so using antibacterial mouthwash can blunt beetroot's benefits.
Dosage Guidance
| Use Case | Dosage |
|---|---|
| Exercise performance | 300–600 mg nitrate |
| Blood pressure support | ~250–500 mL beet juice daily |
| General vascular health | 1 serving beet juice/powder daily |
Always consult a healthcare provider for personalized dosing.
Natural Food Sources
- Fresh beetroot (cooked or raw)
- Beet juice
- Beetroot powder
- Other nitrate-rich vegetables (arugula, spinach, celery)
Potential Side Effects
Very safe as a food. May cause harmless red/pink urine and stool (beeturia). High oxalate content may concern people prone to calcium-oxalate kidney stones.
Who Should Avoid It
- History of calcium-oxalate kidney stones (high oxalate)
- Use with nitrate medications for angina (additive hypotension)
- Very low blood pressure
Pregnancy & Lactation
Beetroot as a food is safe and even beneficial during pregnancy thanks to its folate content. Concentrated high-nitrate supplements have not been specifically studied in pregnancy and should be used only with a clinician's guidance.
Known Drug Interactions
May add to the effect of blood-pressure medications and nitrates (e.g., for angina), potentially causing excessive blood-pressure lowering. Caution with PDE5 inhibitors.
Evidence Classification
Supported by randomized controlled trials (RCTs), systematic reviews, or meta-analyses published in peer-reviewed journals.
Frequently Asked Questions
How long before exercise should I drink beet juice?
Plasma nitrite peaks roughly 2–3 hours after ingestion, so most studies have participants consume beetroot juice about 2–3 hours before activity. Some people use it daily for several days to build a cumulative effect.
Does beetroot really lower blood pressure?
Yes. Multiple meta-analyses show that dietary nitrate from beetroot juice produces a modest but reliable reduction in systolic blood pressure, on the order of 3–5 mmHg, by boosting nitric oxide production.
Why did beets turn my urine pink?
This harmless effect, called beeturia, is caused by betalain pigments that some people excrete in urine and stool. It is not a cause for concern, though if you also notice it after non-beet meals you should check with a doctor about iron status.
Does mouthwash affect beetroot's benefits?
It can. The conversion of nitrate to nitrite relies on beneficial bacteria in your mouth, so using antibacterial mouthwash around the time you consume beetroot can reduce its blood-pressure and performance benefits.
References
- Dietary nitrate supplementation reduces the O2 cost of low-intensity exercise and enhances tolerance to high-intensity exercise in humans. Bailey SJ, Winyard P, Vanhatalo A, et al.. J Appl Physiol (2009)View study
- Inorganic nitrate and beetroot juice supplementation reduces blood pressure in adults: a systematic review and meta-analysis. Siervo M, Lara J, Ogbonmwan I, Mathers JC. J Nutr (2013)View study
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This entry is for educational purposes only. It is not medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement regimen, especially if you take medications or have health conditions.