Trend Breakdown

The Evidence

Does beetroot juice really make you faster?

The nitrate-nitrite-nitric oxide pathway is real, and the performance gains are measurable. But beetroot juice is not the universal ergogenic the market implies. Whether it works for you depends on a single, easily testable variable: how trained you already are.

Updated Published 9 Jun 2026 · Last reviewed 9 Jun 2026 · 3 min read · 5 sources

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Trend Science
Breakdown

Evidence-graded series

02What's being claimed

Beetroot juice is a legal, natural performance booster backed by published research. The nitrate it contains converts to nitric oxide in the body, improving blood flow and muscle efficiency so athletes can sustain harder efforts for longer. That is the claim, and it has genuine peer-reviewed roots.

The trend gained traction on genuinely solid ground. The 2009 Bailey et al. crossover trial in the Journal of Applied Physiology showed that dietary nitrate raises plasma nitrite and nitric oxide, directly lowering the oxygen cost of submaximal cycling ¹. Professional cycling teams adopted nitrate-loading protocols around 2012, lending the claim elite credibility that filtered down through sports media. By 2015, pre-dosed beetroot shots were stocked in mainstream health-food shops, making a laboratory-validated ergogenic accessible to any club runner without a prescription or elaborate preparation.

The biological mechanism the trend describes is genuine. Dietary nitrate, concentrated in beetroot, is reduced to nitrite by oral bacteria and then converted to nitric oxide in hypoxic tissue. Nitric oxide dilates blood vessels and improves mitochondrial efficiency, cutting the oxygen cost of a given power output. Where the research has since qualified the picture is not the existence of this pathway but its magnitude across different populations ⁴.

Origin

Exeter Physiology Lab

Jones, Bailey et al. published the first controlled beetroot-nitrate RCT in 2009, establishing the mechanism.

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Vector

Elite cycling teams

Professional cycling teams adopted nitrate loading protocols around 2012, widely reported in sports science media.

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Spike

Sports nutrition market

Pre-dosed beetroot shots entered mainstream retail by 2015, driving adoption among amateur endurance athletes.

"I started taking beetroot shots before every long run after a cycling friend told me the pros swear by it. Two spoonfuls, two hours out. I genuinely felt I was breathing easier by the end of the first month."

- representative of the claim as it circulates online

03The evidence verdict

HiPerformance Culture The Evidence · Trend Breakdown

Verdict

Dietary nitrate genuinely cuts O2 cost in recreational athletes; elite athletes see little benefit.

This trend lands here

Evidence for the claim: 62/100 (Moderate) 5 sources cited · 1 foundational RCT, 2 systematic reviews, 1 umbrella review, 1 randomised trial · 2009-2025 · how we grade ↓

Every line below is graded by the strength of the evidence behind it.

Gold: strongest available evidence
Silver: solid, not decisive
Bronze: preliminary or indirect

how we grade ↓

✓

What holds up

✓

The nitrate-nitrite-nitric oxide pathway is real: beetroot juice measurably raises plasma nitrite and nitric oxide within 2-3 hours of ingestion, improving mitochondrial efficiency and vasodilation.¹⁴

GoldSupporting study: Bailey 2009 Supporting study: Poon 2025

✓

In recreational and moderately trained athletes, dietary nitrate supplementation reduces submaximal oxygen cost by 3-5% and significantly extends time to exhaustion.¹²⁴

GoldSupporting study: Bailey 2009 Supporting study: Wong 2022 Supporting study: Poon 2025

What doesn't

Elite endurance athletes show little to no improvement in running economy, VO2max, or mechanical parameters; the ergogenic effect diminishes sharply with higher training status.⁴⁵

SilverSupporting study: Poon 2025 Supporting study: Balsalobre-Fernandez 2018

High daily doses (500 ml+) consumed chronically can push dietary nitrate above acceptable daily intake and may stimulate formation of N-nitroso compounds.³

Safety-criticalSilverSupporting study: Zamani 2021

Concurrent use with prescribed nitrate medications (GTN, isosorbide mono/dinitrate) risks additive hypotension and is contraindicated without medical oversight.³

Safety-criticalGoldSupporting study: Zamani 2021

04So what do you actually do

The evidence supports a real but narrow use case; check whether you match the profile.

Recreational and club-level athletes see real, measurable gains; highly trained individuals should test individually.

01Consume ~500 ml of beetroot juice (or 400-500 mg nitrate equivalent) two to three hours before your session.

02Target moderate to high-intensity endurance efforts of 20-80 minutes for the strongest response.

03Avoid if you take prescribed nitrate medication (GTN, isosorbide dinitrate); the blood-pressure interaction is dangerous.

04If your VO2max is above approximately 65 ml/kg/min, expect diminishing returns and test individually before committing.

05The studies

Tier inputs Design quality Measurement precision Causal clarity Replication value

GoldThe strongest evidence available for the specific line it supports: typically systematic reviews, meta-analyses, or randomised trials, or definitive mechanistic work where the line is a mechanistic claim.

SilverSolid but not decisive support: controlled or observational studies, or direct evidence that is small or not yet replicated.

BronzePreliminary or indirect signals; suggestive, never sufficient on their own.

A per-source tier is displayed only when all four axis scores and the weights and thresholds that compute the tier are recorded. Sources without those inputs remain unscored; no tier is inferred from a design label, sample-size phrase, or existing editorial chip. Every source still discloses its design and a resolvable DOI.

-19% O2 cost reduction at submaximal cycling intensity

Crossover RCT · n=8

Bailey et al. Journal of Applied Physiology · 2009

Beetroot juice (~500 ml, ~6 mmol nitrate) reduced the oxygen cost of submaximal cycling by up to 19% and extended time to exhaustion at high intensity. The landmark study demonstrating that dietary nitrate enhances mitochondrial efficiency via the nitrate-nitrite-nitric oxide pathway.

doi:10.1152/japplphysiol.00722.2009 Verify ↗

Randomised double-blind trial · n=12 elite runners

Balsalobre-Fernandez et al. PLoS ONE · 2018

Fifteen days of nitrate-rich beetroot juice improved time to exhaustion in elite middle and long-distance runners (VO2max ~72 ml/kg/min), but produced no meaningful improvement in running economy, VO2max, or running mechanics. Key evidence that ergogenic effects diminish at elite level.

doi:10.1371/journal.pone.0200517 Verify ↗

Contested : Small sample (n=12) and 15-day supplementation window limit statistical power to detect modest performance differences.

Systematic review

Zamani et al. Critical Reviews in Food Science and Nutrition · 2021

Confirmed vasodilatory and oxygen-delivery benefits of beetroot juice. Raised safety concerns: high habitual doses can push nitrate intake above acceptable daily limits, there is potential for N-nitroso compound formation, and co-administration with prescribed nitrate drugs risks dangerous hypotension.

doi:10.1080/10408398.2020.1746629 Verify ↗

Systematic review & meta-analysis · 24 studies, n=335

Wong, Sim & Burns Journal of Exercise Science & Fitness · 2022

Dietary nitrate supplementation produced a statistically significant improvement in high-intensity endurance time-trial performance (5-30 min efforts) across 24 studies and 335 participants. Effects were stronger in recreational athletes than in highly trained competitors, reinforcing the training-status moderation observed elsewhere.

doi:10.1016/j.jesf.2022.06.004 Verify ↗

20 meta-analyses synthesised across 11 performance domains

Umbrella review · 20 systematic reviews with meta-analyses

Poon et al. Sports Medicine · 2025

Synthesised 20 meta-analyses across 11 performance domains. Nitrate supplementation robustly improves time-to-exhaustion, total distance covered, and muscular endurance. Effects on time-trial and sprint performance are less consistent. Training status emerged as the primary moderator: recreationally active individuals benefit most.

doi:10.1007/s40279-025-02194-6 Verify ↗

06The verdict triad

Claim

Natural Ergogenic Aid

Beetroot juice contains dietary nitrate that converts to nitric oxide in the body, lowering the oxygen cost of exercise. The effect is real, published, and mechanistically explained. It is not marketing chemistry.

Consequence

Real Gains, Narrow Profile

A 3-5% reduction in oxygen cost is modest in isolation but compounds over an endurance event. Sub-elite athletes run or ride further at the same perceived effort, and the time-to-exhaustion gains shown in meta-analysis are statistically robust.

Lever

Pre-load, Check, Then Race

Pre-load with ~500 ml two to three hours before your event. Check your training status and rule out any prescribed nitrate medication. If your VO2max is above ~65 ml/kg/min, expect smaller returns.

07The protocol

08What to do next

What to do next

Want to know if you're in the profile that benefits from dietary nitrate?

The HPC Endurance Assessment maps your current training status and identifies which ergogenic aids the evidence actually supports for your fitness level. One short test, evidence-based guidance.

Take the assessment

09Share & references

Update log

9 Jun 2026First published · 5 sources reviewed (foundational RCT, 2 systematic reviews, umbrella review, randomised trial)

20 Aug 2026Machine layer added: structured claim data with an authored veracity verdict, accessible meter with stated evidence position, grading disclosure, and related links and calls to action wired to live destinations.

Next reviewDue by February 2027, or earlier if a new controlled trial or systematic review lands.

Bibliography · every source, resolvable

01Bailey, S.J., Winyard, P., Vanhatalo, A., Blackwell, J.R., DiMenna, F.J., Wilkerson, D.P., Tarr, J., Benjamin, N. & Jones, A.M. (2009). Dietary nitrate supplementation reduces the O2cost of low-intensity exercise and enhances tolerance to high-intensity exercise in humans. Journal of Applied Physiology, 107(4), 1144-1155. doi:10.1152/japplphysiol.00722.2009 Verify ↗

02Wong, T.H., Sim, A. & Burns, S.F. (2022). The effects of nitrate ingestion on high-intensity endurance time-trial performance: A systematic review and meta-analysis. Journal of Exercise Science & Fitness, 20(4), 305-316. doi:10.1016/j.jesf.2022.06.004 Verify ↗

03Zamani, H., de Joode, M.E.J.R., Hossein, I.J., Henckens, N.F.T., Guggeis, M.A., Berends, J.E., de Kok, T.M.C.M. & van Breda, S.G.J. (2021). The benefits and risks of beetroot juice consumption: a systematic review. Critical Reviews in Food Science and Nutrition, 61(5), 788-804. doi:10.1080/10408398.2020.1746629 Verify ↗

04Poon, E.T., Iu, J.C., Sum, W.M., Wong, P., Lo, K.K., Ali, A., Burns, S.F. & Trexler, E.T. (2025). Dietary Nitrate Supplementation and Exercise Performance: An Umbrella Review of 20 Published Systematic Reviews with Meta-analyses. Sports Medicine, 55(5), 1213-1231. doi:10.1007/s40279-025-02194-6 Verify ↗

05Balsalobre-Fernández, C., Romero-Moraleda, B., Cupeiro, R., Peinado, A.B., Butragueño, J. & Benito, P.J. (2018). The effects of beetroot juice supplementation on exercise economy, rating of perceived exertion and running mechanics in elite distance runners: A double-blinded, randomized study. PLOS ONE, 13(7), e0200517. doi:10.1371/journal.pone.0200517 Verify ↗