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UCLA study: magnesium pills may boost athlete sleep and performance

NCT ID NCT07640685

Symptom relief Sponsor: University of California, Los Angeles Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looks at whether taking magnesium glycinate or magnesium L-threonate at night can improve sleep, recovery, and athletic performance in UCLA varsity athletes. 150 participants will take either a magnesium supplement or a placebo for 4 weeks. Sleep and recovery data will be collected using wearable devices and reaction-time tests.

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

About 150 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Jul 2026

An estimate. Start dates often move.

Expected to finish

Jun 2027

An estimate. End dates often move.

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 35 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 to 35 years. * Current UCLA varsity athlete. * Actively training or competing during the study period. * Willing to wear WHOOP or a study-approved wearable device continuously during baseline and treatment periods if wearable data are used. * Willing to take assigned study capsules nightly for 28 days. * Willing to complete brief daily REDCap surveys and weekly adherence/safety check-ins. * Able to provide informed consent and comply with study procedures. Exclusion Criteria: * Current magnesium supplementation without completion of an appropriate washout before baseline. * Current investigational drug or investigational supplement use. * Current use of prescription or over-the-counter sleep medications unless reviewed and permitted by the study clinician. * Diagnosed sleep disorder that, in the investigator's judgment, would confound outcomes or increase risk. * Significant kidney disease or another medical condition that may increase risk with magnesium supplementation. * Known intolerance or allergy to magnesium glycinate, magnesium L-threonate, placebo, or inactive study ingredients. * Use of medications with clinically relevant magnesium interactions unless reviewed and permitted by the study clinician. * Any other condition that, in the investigator's judgment, would make participation unsafe, compromise voluntary consent, or prevent valid outcome assessment.

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Conditions

The condition(s) this trial relates to.

sleep disorder

As listed by the trial registrant

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

Athletic performance Recovery Sleep

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

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Contacts and locations

Locations

  • University of California, Los Angeles

    Los Angeles, California, 90095, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.