What It Is
Beetroot (Beta vulgaris) is a root vegetable that is unusually rich in inorganic dietary nitrate (NO₃⁻). While beets also contain betalain pigments with antioxidant activity, the headline ingredient driving most research is nitrate. Concentrated beetroot juice and standardized beetroot powders deliver a reliable nitrate dose in a small volume, which is why they have become a staple in sports nutrition and cardiovascular research.
The reason nitrate matters is the nitrate–nitrite–nitric oxide pathway. Nitric oxide (NO) is a signaling molecule that relaxes the smooth muscle lining your blood vessels (vasodilation), improving blood flow and lowering pressure. Your body makes some NO from the amino acid arginine, but it can also generate it from dietary nitrate — a separate, oxygen-independent route that becomes especially useful during exercise and in low-oxygen tissues.
Benefits (with Mechanism)
Lower blood pressure. After you swallow nitrate, bacteria on the surface of your tongue reduce it to nitrite. Stomach acid and tissues then convert nitrite to nitric oxide, which dilates arteries. Pooled clinical data suggest beetroot juice can reduce systolic blood pressure by roughly 3-5 mmHg, with smaller diastolic effects. That is a meaningful, drug-adjacent shift for a food — but it is an adjunct to lifestyle and medication, not a substitute.
Improved endurance and exercise efficiency. Nitrate-derived NO appears to make muscle contraction more economical, so you use less oxygen at a given workload. Studies suggest improvements in time-to-exhaustion and performance in efforts lasting roughly 5-30 minutes, with the clearest benefits in recreationally trained (rather than elite) athletes. The effect is most pronounced in low-oxygen conditions, where the nitrate pathway complements the body’s usual NO production.
Vascular and antioxidant support. Beyond acute dilation, regular intake may support endothelial (blood-vessel-lining) function. Beetroot’s betalain pigments also contribute antioxidant and anti-inflammatory activity, though nitrate is the primary mechanism behind the cardiovascular and performance findings.
How to Take (Dosage)
The active target is nitrate, not grams of beet, so look for products that state nitrate content on the label.
- Standard dose: 300-600mg nitrate per day (roughly 5-9 mmol). A typical concentrated “beet shot” is about 70mL and supplies ~400mg.
- For performance: take a single dose 2-3 hours before exercise, when plasma nitrite peaks. A 70-140mL concentrate shot is common.
- For blood pressure: take daily; effects build over 2-4 weeks of consistent use, with a modest acute drop on day one.
- Loading vs. single dose: a few days of daily dosing before a key event may outperform a one-off dose for some people.
Do not use antibacterial mouthwash, antiseptic gum, or strong oral antiseptics around your dosing window. They kill the tongue bacteria that perform the first conversion step and can largely cancel the benefit. Swallow rather than swish, and don’t spit.
Beetroot pairs naturally with other nitric-oxide supports such as citrulline and l-arginine, and with cardiovascular supplements like coq10 and omega-3.
Best Forms
- Concentrated juice (“beet shots”): the most-studied form; convenient and reliably dosed when nitrate content is listed.
- Standardized powder: good for travel and mixing into drinks; choose products that specify nitrate (mg or mmol), not just “beetroot extract.”
- Whole beets and raw beet juice: healthy and effective but variable in nitrate, so dosing is less precise.
Avoid relying on capsules labeled only with beetroot weight, since nitrate content can be low or unstated. Third-party-tested products (e.g., NSF Certified for Sport, Informed Sport) are preferable for competitive athletes.
Safety & Side Effects
Beetroot is a food and is well tolerated for most people. Common, harmless effects include:
- Beeturia: pink or red urine and stool from the pigments — completely benign.
- Mild GI upset at higher doses; take with food if needed.
Use more caution if you:
- Have very low blood pressure or feel lightheaded — the vasodilating effect can stack with other lowering influences.
- Are prone to kidney stones; beets are high in oxalate, which matters on oxalate-restricted diets.
- Are pregnant or breastfeeding — concentrated supplemental doses lack robust safety data, so stick to food amounts unless your clinician advises otherwise.
Beetroot is an adjunct to, not a replacement for, prescribed blood-pressure therapy. If your readings are high, work with your doctor rather than self-treating.
Drug Interactions
- Blood-pressure medications (ACE inhibitors, ARBs, calcium channel blockers, diuretics): additive lowering — monitor and discuss with your prescriber.
- Organic nitrates (nitroglycerin, isosorbide): both raise NO; combining can cause excessive hypotension.
- PDE-5 inhibitors (sildenafil/Viagra, tadalafil/Cialis): can amplify the drop in blood pressure.
- Antibacterial mouthwash / antiseptic gum: not a drug, but a major negative interaction — it disrupts the oral bacteria that activate nitrate and can erase the benefit.
If you take any of the above, talk to your doctor before adding concentrated beetroot.
Bottom Line
Beetroot is one of the few food-based supplements with consistent evidence behind it: 300-600mg of dietary nitrate can modestly lower blood pressure and improve endurance by making your body’s oxygen use more efficient. Take it as a standardized juice or powder, time performance doses 2-3 hours before exercise, give blood-pressure benefits 2-4 weeks to develop, and keep antibacterial mouthwash away from your dosing window. It is a low-risk, evidence-backed adjunct — not a stand-in for prescribed medication — and a strong fit for endurance athletes and anyone supporting healthy blood pressure under a doctor’s guidance.