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Berry boost: blackcurrant supplement linked to big strength gains in Gym-Goers

NCT ID NCT07619976

Symptom relief Sponsor: Jacksonville State 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 a supplement made from New Zealand blackcurrants could help people who do strength training lift more and think sharper. Twenty healthy adults who regularly lifted weights took either a low or high dose of the supplement, a placebo, or nothing for a week. Results showed that both doses increased how much weight they could lift and improved mental focus, with no side effects.

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

20 people

The number who actually took part.

Started

Jan 2023

Finished

Jul 2023

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

Anyone

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: * Age 18-40 years * At least 2 years of regular resistance training that included the bench press and either the leg press or squat * Body mass index (BMI) of 18.5-24.9 kg/m² Exclusion Criteria: * Diagnosed with a metabolic, cardiovascular, or thyroid disorder * Current use of prescription or over-the-counter agents with potential cardiovascular or neurocognitive effects (e.g., beta-blockers or stimulants) * Tobacco use, vaping, or smokeless nicotine use * Self-reported blackcurrant sensitivity * Habitual alcohol intake greater than 12 standard drinks per week * Any recent musculoskeletal injury likely to impair testing * Resting heart rate exceeding 100 bpm at familiarization * Resting blood pressure ≥140/90 mmHg at familiarization after repeat confirmation * Body fat percentage exceeding the study's predefined threshold at familiarization

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As listed by the trial registrant

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

Anaerobic performance Cognitive function Dietary supplementation athletic performance Resistance exercise performance

Contacts and locations

Locations

  • Exercise Physiology and Nutrition Laboratory (EPNL) at Jacksonville State University

    Jacksonville, Alabama, 36265-1724, United States

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