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Beetroot and caffeine combo tested for cycling edge

NCT ID NCT07501806

Symptom relief Sponsor: Lindenwood University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at whether taking nitrate (from beetroot juice) and caffeine together improves performance in a 3-minute all-out cycling test. Fifteen trained male cyclists completed four different supplement conditions in a randomized, double-blind trial. The goal was to see if the combination offers extra benefits over either supplement alone.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
dietary nitrate (from beetroot juice) and caffeine
What this could lead to
If it works, this could point toward a simple dietary strategy to improve high-intensity cycling performance.
What could go wrong
This is a very small, early-stage study with only 15 participants, so results may not apply to all athletes. The effects may be small or not meaningful for real-world performance.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

15 people

The number who actually took part.

Started

Nov 2020

Finished

Nov 2021

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 40 years

Sex

Male participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Males between the ages of 18 and 40 years of age * All participants must be trained cyclists, having participated in structured cycling training consisting of at least 2-3 sessions per week for at least 30-60 min each session during the past 12 months. * All participants must possess a relative max power output (Wmax) of 4.0 W/kg or greater OR a maximal oxygen consumption (VO2max) of 50 ml/kg/min. * All participants must be healthy and free of any disease as determined through the completion of a medical history questionnaire. * Body mass index (BMI) between 18.5 - 30 kg/m\^2 OR bodyfat percentage \<30% Exclusion Criteria: * All females * Males who are younger than 18 years and older than 40 years of age * Individuals who have a VO2max below 50 ml/kg/min and a relative Wmax below 4.0 W/kg * Individuals who fail to meet the minimum training requirements of 2-3 sessions per week of structured cycling training for at least 30-60 min per session during the past 12 months. * Any individual currently diagnosed with or being treated for any cardiovascular, renal, pulmonary, orthopedic, immunological, psychological or musculoskeletal disorder. * Any individual who is currently supplementing with a known or purported ergogenic aid (nitrates, caffeine, beta-alanine, bicarbonate, creative, Cordyceps) will be required to refrain from their use for 30 days before beginning the study. * Individuals who regularly smoke or have quit smoking within the last 6 months.

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Cycling performance Exercise performance Exercise performance of fit athletes

Contacts and locations

Locations

  • Exercise and Performance Nutrition Laboratory

    Saint Charles, Missouri, 63301, United States

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