Beetroot Juice for Performance: The Nitrate Strate…

Beetroot juice went from folk remedy to mainstream sports nutrition in 2009 when a study by Bailey and colleagues at the University of Exeter showed it meaningfully reduced the oxygen cost of exercise. Since then, the research has expanded to dozens of well-controlled trials. The mechanism is well understood, the optimal protocol is clear, and importantly, so are the cases where it does not help.

The Nitrate to Nitric Oxide Pathway

Dietary nitrate (NO3-), abundant in beetroot, leafy greens, and celery, follows a reductive pathway to nitric oxide in the body:

Nitrate (NO3-) → Nitrite (NO2-) → Nitric Oxide (NO)

The first conversion happens in the mouth. Bacteria on the tongue reduce nitrate to nitrite — which is why antibacterial mouthwash used before beetroot supplementation completely abolishes its ergogenic effect. The second conversion occurs in tissues, accelerated by low oxygen conditions (hypoxia) and low pH — exactly the conditions inside working muscles during intense exercise.

The resulting nitric oxide acts via two mechanisms relevant to performance:

Vasodilation: Relaxation of blood vessel smooth muscle, increasing blood flow to working muscles
Mitochondrial efficiency: Direct improvements in the efficiency of oxidative phosphorylation, meaning less oxygen is required to produce the same amount of ATP

This second mechanism — improved mitochondrial efficiency — is what distinguishes nitrate from simple vasodilators like citrulline. The oxygen cost of exercise genuinely decreases.

Dosing: 400–600mg Nitrate per Serving

The effective dose established across multiple studies is 400–600mg of inorganic nitrate, equivalent to approximately 500mL (about 2 cups) of whole beetroot juice or 70–140mL of concentrated beetroot shots (the small 70mL shots common in UK sports nutrition typically contain 400mg nitrate).

Dose landmarks from the research:

Below 300mg: Sub-threshold; inconsistent performance effects
400–600mg: Reliable performance improvement in recreationally to well-trained athletes
Above 800mg: Marginal additional benefit; potential for GI discomfort

Check your product's nitrate content, as it varies substantially across brands and depends on growing conditions of the beets.

Timing: The 2–3 Hour Window

Peak plasma nitrite elevation — the active intermediate — occurs approximately 2–3 hours after nitrate ingestion. For acute supplementation before a competition or key training session, consuming beetroot juice or a concentrated shot 2–3 hours prior provides optimal timing.

This is one of the longer lead times in sports nutrition, so plan accordingly. Taking a shot immediately before training will not deliver the benefit within that session.

Acute vs. Loading Protocol

Both approaches work, but 6–10 days of loading produces more sustained nitrite elevation and may produce greater total performance improvement than acute single-dose use. The loading strategy is preferable for athletes peaking for a competition that spans multiple days, or for building a sustained training benefit.

Acute single-dose use (one shot 2–3 hours before) is appropriate for one-off performance events.

Who Benefits Most — and Who Does Not

This is where beetroot research becomes more nuanced. Training status is a critical moderator:

Recreational and moderately trained athletes show the most consistent and meaningful performance improvements — typically 1–3% improvement in time trial performance
Elite or highly trained athletes show smaller or no significant benefits in many studies. The leading explanation is that highly trained athletes already have more efficient mitochondria and better oxygen extraction, leaving less room for the nitrate mechanism to improve

Altitude and hypoxic conditions amplify the benefit. The nitrate-to-nitrite conversion is accelerated under low oxygen conditions, making beetroot supplementation particularly relevant for altitude racing or training camps.

Moderate-intensity exercise (around 60–80% VO2 max) shows the clearest benefits. Very high-intensity efforts lasting under 2 minutes and low-intensity aerobic work show weaker effects.

Leafy Greens as an Alternative Source

Beetroot is not the only source of dietary nitrate. Arugula, spinach, and celery are among the highest-nitrate foods available and can contribute meaningfully to daily nitrate intake for athletes who eat them in quantity. Arugula at 2 cups contains roughly 150–200mg nitrate — useful but below the acute performance dose, making concentrated beet shots more practical for targeted pre-event use.

WADA Status and Red Urine

Dietary nitrate is fully legal under World Anti-Doping Agency rules. Beetroot juice is consumed by elite athletes across Olympic sports without restriction.

One cosmetically surprising effect: beeturia — red or pink discoloration of urine and sometimes stools after consuming beetroot. This is harmless and caused by betalain pigments from the beet, not blood. Approximately 10–15% of people experience it, related to gut transit rate and the capacity to break down betalains in the colon.

Practical Protocol

Dose: 70mL concentrated beet shot (400mg nitrate) or 500mL whole beetroot juice
Timing: 2–3 hours before training or competition
Loading: For multi-day events, 6–10 days of daily dosing prior
Avoid: Antibacterial mouthwash within 2 hours of ingestion (kills nitrate-reducing bacteria)
Best candidates: Recreational to moderately trained athletes, altitude events, 4–20 minute high-intensity efforts

The Bottom Line

Beetroot juice and concentrated nitrate shots provide a genuine, WADA-approved performance benefit for moderate-to-well-trained athletes, particularly in endurance efforts at moderate-to-high intensities. Use 400–600mg of nitrate 2–3 hours before performance, consider 6–10 days of loading for major events, and skip the antibacterial mouthwash.

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Beetroot Juice for Performance: The Nitrate Strategy That Actually Works