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Study identifier: NCT07654777 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

The Efficacy of Vitamin D Supplementation to Sustain Performance Outcomes

Condition: Acute Stress Reaction  ·  Sponsor: Walter Reed Army Institute of Research (WRAIR)

PhaseNA
Planned participants52
Who can joinAll sexes, 18 Years to 40 Years
Healthy volunteersYes

About this study

The goal of this clinical trial is to find out if vitamin D supplements help healthy adults maintain their cognitive and simple physical task performance and emotional state during highly stressful situations. The main question it aims to answer is: \- Does vitamin D help maintain cognitive and physical task performance and emotional state during highly stressful situations? Researchers will compare vitamin D to placebo (a look-alike tablet that contains no active ingredients) to see if vitamin D better maintain cognitive and physical task performance and emotional state during highly stressful situations. Participants will: * Take vitamin D or placebo tablets daily for 8 weeks. * Perform cognitive and simple physical tasks and rate their emotional state under highly stressful situations. * Wear a stress belt that delivers mild electric shocks 1 - 5 times while participants are performing laboratory tasks. * Wear a wristwatch-shaped activity monitor for 9 weeks. * Visit the laboratory 5 times.

This description comes directly from the study's public registry record.

Talk to the study team

Ihori Kobayashi, Ph.D.  ·  301-319-9287  ·  ihori.kobayashi.ctr@health.mil

Lonique Moore, MSPH  ·  301-319-9287  ·  lonique.t.moore.ctr@health.mil

Always discuss trial participation with your own doctor first.

Locations (1)

Sleep Research Center (SRC), Walter Reed Army Institute of Research (WRAIR)Silver Spring, Maryland, United StatesRecruiting

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Source record: clinicaltrials.gov/study/NCT07654777