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Beetroot Juice and Nitrates: Endurance, Timing and Limits

By Tomás Leal · Sports dietitian9 min readPublished 09/11/2026
Sources
4
Validated claims
2
Dominant evidence
Limited
Freshness
09/11/2026
Beetroot Juice and Nitrates: Endurance, Timing and Limits

Beetroot juice interests endurance athletes because it provides dietary nitrates. These compounds may change some exercise markers, but they do not guarantee a faster time or the same benefit for everyone. The key is to distinguish a plausible mechanism, a laboratory result and an improvement that is useful in competition.

01

What nitrates may change After ingestion, some nitrate follows a pathway through nitrite and nitric oxide. This pathway contributes to vascular regulation and may change oxygen cost during some efforts. It explains why beetroot juice is studied, but does not show that it automatically raises VO2max or performance.

02

Which athletes may respond? Studies include recreationally active adults, trained athletes and some elite athletes, using different tests. The signal appears more consistent in recreationally active adults than in highly trained endurance athletes, but this comparison depends on protocols and sample sizes. An individual response is possible but not predictable.

Beetroot juice does not replace a meal, exercise carbohydrates or hydration. See also carbohydrates around endurance exercise, electrolyte drinks and sodium, and caffeine in sport.

03

Dose and timing: reference points, not a prescription Acute protocols often use a dose about 2 to 3 hours before exercise. Trials and reviews have studied about 5 to 9 mmol of nitrate, roughly 310 to 560 mg, but doses, products and populations are not interchangeable. Powder weight or juice volume does not reveal the active amount; check the declared nitrate content when available.

An antibacterial mouthwash may reduce oral nitrate conversion in some protocols. This does not justify stopping prescribed care or neglecting dental hygiene. It simply shows that the response does not depend only on the glass of juice.

04

Marketing versus data Saying that beetroot juice “oxygenates muscles” or “increases power” without naming the test and population oversimplifies the evidence. The data are more nuanced: some outcomes improve, others do not, and average effects are usually modest. A time-to-exhaustion test does not directly predict a faster race time.

05

How to try it without fooling yourself If you want to test it, choose a comparable, non-critical session, record the product and its declared content, and keep the meal, caffeine, warm-up and intensity consistent. Compare several sessions with and without it rather than relying on one sensation. If no reproducible difference appears, increasing the dose is not a logical conclusion.

Any possible benefit comes alongside sufficient food, coherent training, sleep and suitable hydration. No juice compensates for low energy availability or a poorly adjusted plan.

06FAQ ### Does beetroot juice raise VO2max? The evidence does not support a general claim. Some reviews find small aerobic effects in active adults, while other results show no clear VO2max improvement.

01Should I drink it just before running? No. Acute protocols often study a dose 2 to 3 hours before exercise. This is a research reference window, not an exact time for everyone.
02Does beetroot juice replace a sports drink? No. It does not automatically provide the carbohydrates, fluids and sodium required for every duration and sweat loss.
07

Sources - Gao et al., Journal of the International Society of Sports Nutrition, 2021 — https://pmc.ncbi.nlm.nih.gov/articles/PMC8268374/ - Domínguez et al., Nutrients, 2017 — https://pmc.ncbi.nlm.nih.gov/articles/PMC5295087/ - Shannon et al., Sports Medicine, 2022 — https://pmc.ncbi.nlm.nih.gov/articles/PMC9474378/ - Senefeld et al., PubMed, 2025 — https://pubmed.ncbi.nlm.nih.gov/40573069/

Sources

Peer-reviewed studies and institutional references used for this article.

  1. 1Senefeld et al., PubMed· 2025
    Meta-analysisLimited

    adultes sains, sportifs professionnels et non-athlètes

    View source
  2. 2Shannon et al., Sports Medicine· 2022
    Official guidelineLikely

    adultes et sportifs

    View source
  3. 3Gao et al., Journal of the International Society of Sports Nutrition· 2021
    Meta-analysisLimited

    adultes sains pratiquant une activité d endurance · 1061 participants

    View source
  4. 4Domínguez et al., Nutrients· 2017
    Systematic reviewLimited

    athlètes et adultes entraînés · 23 participants

    View source

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Tomás Leal

Works with endurance athletes on periodised fuelling strategies.

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