How much beetroot juice should I drink before a workout?

Consume 500 ml of beetroot juice or 1–2 concentrated shots, providing approximately 6–8 mmol (400 mg) of nitrate. This equates to roughly 3.7 mg nitrate per kilogram of body weight.

When should I drink beetroot juice for athletic performance?

Drink it 90–120 minutes before exercise to allow oral bacteria to convert nitrates to nitrites and peak nitric oxide availability. For major events, consider a 5–7 day loading protocol with daily doses.

Does beetroot juice work for all athletes?

No. Meta-analyses show it works best for recreationally active individuals. Elite endurance athletes with VO₂max ≥65 ml·kg·min⁻¹ show negligible benefits, and evidence in female athletes is limited or null.

Can I mix beetroot juice with caffeine?

Evidence is mixed. Some studies suggest synergy when caffeine is taken 60 minutes pre-exercise and beetroot 90 minutes pre-exercise; others suggest caffeine may undermine nitrate's effects. Test in training first.

Why shouldn't I use mouthwash when taking beetroot juice?

Antibacterial mouthwash kills the oral bacteria necessary to convert dietary nitrate to nitrite, the essential first step before nitric oxide production. Avoid mouthwash for 24 hours before dosing.

Is beetroot powder as effective as beetroot juice?

Beetroot powder can be effective if it provides 6–8 mmol nitrate per dose, but nitrate content varies by brand. Beetroot juice has stronger evidence backing due to standardized nitrate concentrations.

Beetroot Juice for Athletic Performance -… | Infoluenced

96%

Strong consensus18 expert sources

The 90-Minute Purple Advantage: How Beetroot Juice Rewires Your Endurance

Drink beetroot juice 90 minutes before you train. The nitrates convert to nitric oxide, dilating blood vessels and reducing how much oxygen your muscles need to maintain pace.

0mmol

90-min window·6–16 mmol range·4% less O₂

nitrate, 90 min pre-workout

What the experts found

What 18 expert sources agree on

Beetroot juice supplying ~5–8 mmol nitrate taken ~90 minutes to 3 hours before endurance exercise improves cardiorespiratory efficiency, time to exhaustion, and performance.

Where they disagree

One source notes the ergogenic effect may be blunted when beetroot is combined with other supplements such as caffeine, contradicting evidence that the two stack well.

Sources

The Infoluenced Index weighed 30 expert sources to score this article.

13 combined studies17 qualified experts

Edited by Luke WelchHow we weigh sources →

01What

The Overview

You want to run faster without logging extra miles. Beetroot juice offers a legal, evidence-backed ergogenic aid that works by the time you finish your warm-up. According to research published in *Nutrients* (Chen Tian et al., 2025), acute supplementation with 8.3–16.4 mmol nitrate 2–3 hours before exercise produces measurable improvements in exercise tolerance, particularly for recreational athletes.

The catch? This isn't a super-drug. A 2020 meta-analysis by Senefeld et al. found the overall effect size is small (Cohen's d = 0.174) and essentially disappears in well-trained endurance athletes. But if you're a club runner, weekend cyclist, or gym-goer looking to shave seconds off your 5K or extend your final set, the purple juice delivers consistent, if modest, returns.

02Why

The Evidence

Step 1

Swallow nitrates

Consume 6–8 mmol nitrate from beetroot juice or concentrate.

Step 2

Bacteria convert

Oral microbes reduce nitrate to nitrite over 90–120 minutes.

Step 3

Stomach activates

Gastric acid converts nitrite to nitric oxide gas.

Step 4

Vessels dilate

Nitric oxide signals blood vessels to widen, increasing flow.

visual: veins

Step 5

Muscles economize

Mitochondria use less oxygen to produce the same power.

visual: mitochondria

How big is the effect?

The ergogenic effect is small but statistically significant, with meta-analyses reporting effect sizes of Cohen's d ≈ 0.17–0.28 for time-to-exhaustion and trivial effects (d ≈ 0.08) for muscle strength. In practical terms, expect a 1–3% improvement in performance metrics—meaningful for competitive amateurs but borderline negligible for elites. Effects are inconsistent in women and largely absent in highly trained endurance athletes.

Does the form matter?

Beetroot juice (liquid)Strong
Most studied form; 500 ml typically provides 6–8 mmol nitrate with established bioavailability.
Concentrated beetroot shotsStrong
Equivalent to 500 ml juice in 70–140 ml volume; convenient and consistently dosed.
Beetroot powderModerate
Variable nitrate content between brands; requires verification of nitrate concentration per serving.
Whole beetrootLimited
Lower nitrate bioavailability compared to juice; requires larger volumes to achieve therapeutic dose.

The consensus

Independent meta-analyses confirm small but consistent benefits for recreationally active individuals, though effects vanish in elite endurance athletes.

03When & Where

Your Routine

When

90–120 min pre-exercise

2 min

What happens

Consume 6–8 mmol nitrate (500 ml juice or 1–2 shots). Avoid mouthwash today.

When

60 min pre-exercise

Ongoing

What happens

Optional: Caffeine dose (3–5 mg/kg) if tolerated and tested.

When

0 min (Go time)

Duration of event

What happens

Peak nitric oxide availability supports reduced oxygen cost and enhanced blood flow.

When

Days 1–7 (Loading)

5–7 days

What happens

For major events, daily 400 mg nitrate builds muscle stores over 5–7 days.

04How

Take Action

Calculate nitrate dose

~30s

Aim for 6–8 mmol nitrate (approx 400 mg or 3.7 mg per kg body weight).

Common mistake — Ignoring the concentration—some juices are diluted.

Pick your delivery method

~60s

Choose 500 ml standard juice, 1–2 concentrated shots, or measured powder mixed in water.

Pro tip — Chill it—cold beetroot juice tastes significantly better.

Time the intake

~30s

Drink it exactly 90–120 minutes before your workout or race starts.

Common mistake — Drinking it immediately before exercise—too late for peak NO.

Avoid antibacterial mouthwash

~10s

Skip antiseptic rinses for 24 hours pre-dose to protect nitrate-reducing oral bacteria.

Test in training first

~120s

Try your full race-day protocol during a hard training session to check for GI distress.

Major pitfall

The last-minute chug

I used to slam it right before my warm-up. Too late. The nitrate-to-nitric-oxide conversion needs a full 90–120 minutes to peak.

Major pitfall

Mouthwash sabotage

I brushed with antibacterial rinse race morning, unknowingly killing the oral bacteria that convert nitrates to nitrites. The juice can't work without them.

Watch out

Elite expectations

I'm a sub-elite runner expecting miracles. The research is clear: if your VO₂max is already north of 65, the gains are statistically negligible.

Pro tip

Lemon cuts earth

Add a splash of lemon or lime juice. It masks the dirt-like taste without interfering with the nitrate chemistry.

Pro tip

Altitude amplifier

Heading to the mountains? The oxygen-sparing effect is amplified in hypoxic conditions—double down on your dosing protocol.

Pro tip

Caffeine separation

If using caffeine, take it 30 minutes after your beetroot dose (60 min pre-exercise) to minimize potential interference while maintaining both effects.

The honest bit

What this article can’t tell you

The evidence base is overwhelmingly drawn from young, healthy male athletes; extrapolation to women and older adults is uncertain, with several meta-analyses finding null effects in female-only cohorts.
Most studies measure acute or short-term effects (single dose to 15 days); long-term safety and efficacy of chronic nitrate supplementation beyond 2 weeks is less established.
Effect sizes are small (Cohen's d ≈ 0.2) and likely imperceptible to elite athletes who have already optimized physiological adaptations; this is a marginal gain tool for sub-elites.
Beetroot juice can cause gastrointestinal distress, red urine (beeturia), and hypotension in some individuals; test in training before race day.
Antibacterial mouthwash and certain proton pump inhibitors may abolish the effect by disrupting the oral nitrate-reducing bacteria required for the conversion pathway.

Quick answers

Your questions, answered

How much beetroot juice should I drink before a workout?: Consume 500 ml of beetroot juice or 1–2 concentrated shots, providing approximately 6–8 mmol (400 mg) of nitrate. This equates to roughly 3.7 mg nitrate per kilogram of body weight.
When should I drink beetroot juice for athletic performance?: Drink it 90–120 minutes before exercise to allow oral bacteria to convert nitrates to nitrites and peak nitric oxide availability. For major events, consider a 5–7 day loading protocol with daily doses.
Does beetroot juice work for all athletes?: No. Meta-analyses show it works best for recreationally active individuals. Elite endurance athletes with VO₂max ≥65 ml·kg·min⁻¹ show negligible benefits, and evidence in female athletes is limited or null.
Can I mix beetroot juice with caffeine?: Evidence is mixed. Some studies suggest synergy when caffeine is taken 60 minutes pre-exercise and beetroot 90 minutes pre-exercise; others suggest caffeine may undermine nitrate's effects. Test in training first.
Why shouldn't I use mouthwash when taking beetroot juice?: Antibacterial mouthwash kills the oral bacteria necessary to convert dietary nitrate to nitrite, the essential first step before nitric oxide production. Avoid mouthwash for 24 hours before dosing.
Is beetroot powder as effective as beetroot juice?: Beetroot powder can be effective if it provides 6–8 mmol nitrate per dose, but nitrate content varies by brand. Beetroot juice has stronger evidence backing due to standardized nitrate concentrations.

Set your 90-minute timer

Your next PB might not require more miles—just better chemistry. Start with one shot 90 minutes before tomorrow's run.

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