Coenzyme Q10 for Gulf War Illness: A Replication Study

April 27, 2026 updated by: Beatrice Golomb, University of California, San Diego
The purpose of this study is to assess whether a high quality preparation of ubiquinone (coenzyme Q10) benefits symptoms, function, and quality of life in veterans with Gulf War illness.

Study Overview

Study Type

Interventional

Enrollment (Estimated)

192

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

    • California
      • La Jolla, California, United States, 92093
        • Recruiting
        • UC San Diego
        • Contact:
        • Principal Investigator:
          • Beatrice A. Golomb, MD, PhD

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Meets both CDC and Kansas deployment and symptom inclusion criteria.
  • Does not have a disqualifying condition.
  • Able to travel to a local Quest facility for study blood draws.
  • Adequate internet access to allow ZoomPro visit participation and remote survey completion.
  • Health prior to the Gulf War rated as "very good" or "excellent" (to exclude persons who may have had other health conditions with different mechanisms as the cause of their symptoms).
  • Willing to defer initiation of discretionary treatments or supplements during the expected course of study participation.

Exclusion Criteria:

  • Participating in another clinical trial.
  • Still-evolving adverse effects following another medication or health condition, such as covid or fluoroquinolone use.
  • On Coumadin/ warfarin.
  • Unable to participate for the required duration of the study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: CoQ10 Arm 1
PharmaNord Ubiquinone 100mg/1x day

Each participant receives one softgel three times a day. Arm 1 receives one 100mg softgel and two placebo softgels per day.

Because of the presence of the IND, the dropdown menu does not allow us to choose dietary supplement. The option "drug" was chosen as the closest permissible option.

Each participant receives one softgel three times a day. Arm 2 receives three 100mg softgels per day. Supplement is taken orally in divided doses, with the last softgel not close to bedtime.

Because of the presence of the IND, the dropdown menu does not allow us to choose dietary supplement. The option "drug" was chosen as the closest permissible option.

Active Comparator: CoQ10 Arm 2
PharmaNord Ubiquinone 100mg/3x day

Each participant receives one softgel three times a day. Arm 1 receives one 100mg softgel and two placebo softgels per day.

Because of the presence of the IND, the dropdown menu does not allow us to choose dietary supplement. The option "drug" was chosen as the closest permissible option.

Each participant receives one softgel three times a day. Arm 2 receives three 100mg softgels per day. Supplement is taken orally in divided doses, with the last softgel not close to bedtime.

Because of the presence of the IND, the dropdown menu does not allow us to choose dietary supplement. The option "drug" was chosen as the closest permissible option.

Placebo Comparator: Placebo Arm
Placebo (made by PharmaNord, matches active treatment)

Each participant receives one softgel three times a day. Arm 3 receives three placebo softgels per day. Supplement is taken orally in divided doses, with the last softgel not close to bedtime.

Because of the presence of the IND, the dropdown menu does not allow us to choose dietary supplement. The option "drug" was chosen as the closest permissible option.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Number of symptoms (out of 20 on the UCSD Symptom Score Survey) showing more favorable change (trend or effect) on active treatment vs. on placebo.
Time Frame: 3.5 months
All outcomes are assessed as change from baseline.
3.5 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percent improved on timed chair rises from Gulf War Illness Modified Lower Extremity Summary Performance Score.
Time Frame: 3.5 months
All outcomes are assessed as change from baseline.
3.5 months
Mean change in single-item General Self-Rated Health (GSRH).
Time Frame: 3.5 months
All outcomes are assessed as change from baseline. 5 point scale, higher is good.
3.5 months
Individual GWI Symptoms
Time Frame: 3.5, 7 months
7 validated single-item symptom self-ratings: headache; energy; fatigue with exertion, muscle pain; irritability; impatience; trouble recalling words/names. Each benefited with coQ10, p<0.05 (two-sided), in the prior coQ10 trial.
3.5, 7 months
Relation of change in time to do five chair rises to change in blood level of coenzyme Q10
Time Frame: 3.5, 7 months
Benefit to timed chair rises will relate to blood coQ10 change. This outcome assesses the relation between change in time to complete five chair rises (in seconds) to change in blood level of CoQ10 (in ug/mL). The prediction of change in time to perform five chair rises by change in coQ10 blood level (regression with robust standard errors).
3.5, 7 months
Effect of CoQ10 in the majority male subset on symptoms.
Time Frame: 3.5, 7 months
Change in symptoms on coQ10 versus placebo will be assessed in men (male subset of sample).
3.5, 7 months
Effect of CoQ10 in the majority male subset on timed chair rises.
Time Frame: 3.5, 7 months
Change in timed chair rises on coQ10 versus placebo will be assessed in men (male subset of sample).
3.5, 7 months
Effect of CoQ10 in the majority male subset on GSRH.
Time Frame: 3.5, 7 months
Change in GSRH on coQ10 versus placebo will be assessed in men (male subset of sample).
3.5, 7 months

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Duration Effect on symptoms. Compare effects of 7 months vs 3.5 months of treatment, assessed at the same time point after baseline (7 months) on symptoms.
Time Frame: 7 months
Following seven months of study participation, participants will have been on coQ10 for either 3.5 months or 7 months. These two groups will be compared to assess the impact of longer vs. shorter duration treatment (those initially randomized to placebo will crossover to active coQ10 for the final 3.5 months, while those originally randomized to coQ10 will have been on coQ10 for 7 months).
7 months
Duration Effect on timed chair rises. Compare effects of 7 months vs 3.5 months of treatment, assessed at the same time point after baseline (7 months) on timed chair rises.
Time Frame: 7 months
Following seven months of study participation, participants will have been on coQ10 for either 3.5 months or 7 months. These two groups will be compared to assess the impact of longer vs. shorter duration treatment (those initially randomized to placebo will crossover to active coQ10 for the final 3.5 months, while those originally randomized to coQ10 will have been on coQ10 for 7 months).
7 months
Duration Effect on GSRH. Compare effects of 7 months vs 3.5 months of treatment, assessed at the same time point after baseline (7 months) on GSRH.
Time Frame: 7 months
Following seven months of study participation, participants will have been on coQ10 for either 3.5 months or 7 months. These two groups will be compared to assess the impact of longer vs. shorter duration treatment (those initially randomized to placebo will crossover to active coQ10 for the final 3.5 months, while those originally randomized to coQ10 will have been on coQ10 for 7 months).
7 months
Blood Pressure
Time Frame: 3.5, 7 months
Specifically, change in blood pressure on coq10 versus placebo will be assessed considering those with low blood pressure at baseline separately from those with borderline or high blood pressure at baseline.
3.5, 7 months
Mitochondrial Function from blood spot card. Maximal respiration will be assessed by the "adopted transfer" technique.
Time Frame: 3.5, 7 months
3.5, 7 months
Mitochondrial Function from blood spot card. Spare capacity will be assessed by the "adopted transfer" technique.
Time Frame: 3.5, 7 months
3.5, 7 months
Inflammation (hsCRP) will be assessed as change from baseline and compared on active treatment vs. placebo.
Time Frame: 3.5, 7 months
3.5, 7 months
Liver Function. Alanine aminotransferase and aspartate aminotransferase will be assessed as change from baseline and compared on active treatment vs. placebo.
Time Frame: 3.5, 7 months
3.5, 7 months
The investigator will assess whether there is a difference in change effect for the 100mg/day vs 300mg/day arm on symptoms.
Time Frame: 3.5, 7 months
Compare the effect of coQ10 300mg/day to placebo, and to coQ10 100mg/d on symptoms.
3.5, 7 months
The investigator will assess whether there is a difference in change effect for the 100mg/day vs 300mg/day arm on timed chair rises.
Time Frame: 3.5, 7 months
Compare the effect of coQ10 300mg/day to placebo, and to coQ10 100mg/d on timed chair rises.
3.5, 7 months
The investigator will assess whether there is a difference in change effect for the 100mg/day vs 300mg/day arm on GSRH.
Time Frame: 3.5, 7 months
Compare the effect of coQ10 300mg/day to placebo, and to coQ10 100mg/d on GSRH.
3.5, 7 months
Oxidative Stress
Time Frame: 3.5, 7 months
3.5, 7 months
Dropouts for Cause. The investigator will report participants who drop out for a reason.
Time Frame: 3.5, 7 months
For instance, participants who transition from coQ10 to placebo might drop because of lost of needed benefits of coQ10 -- because the participant felt worse. Alternatively, participants who transition from placebo run-in to coQ10 might drop out due to problems like activation insomnia on active treatment. The number of dropouts will be compared on active treatment vs placebo, and the causes of dropout will be compared also. (Participants who drop because their physicians ask them to do so for some unrelated reason, not because the patient has had a problem or perceive a problem, will count as dropouts, but not as dropouts for "cause" -- cause here refers to a symptom change and/or medical event.) In addition to overall assessment, assessment of dropouts for cause will be evaluated stratified by whether the participant is transitioning from coQ10.
3.5, 7 months
Relation of change in symptoms to change in blood level of coenzyme Q10
Time Frame: 3.5 +/- 0.5 months (priority), and ~7 months
This outcome assesses the relation between change in symptoms to change in blood level of CoQ10 (in ug/mL).
3.5 +/- 0.5 months (priority), and ~7 months
Relation of change in single-item General Self-Rated Health (GSRH) to change in blood level of coenzyme Q10
Time Frame: 3.5, 7 months
This outcome assesses the relation between change in single-item General Self-Rated Health (GSRH) to change in blood level of CoQ10 (in ug/mL). The GSRH is a 5 point scale, higher is good.
3.5, 7 months
Subset effects in those citing prior coQ10 use, stratified by whether benefit had been perceived.
Time Frame: 3.5, 7 months
3.5, 7 months
Analysis stratified by presence of symptoms compatible with sleep apnea
Time Frame: 3.5, 7 months
For inclusion in sleep apnea stratum during analysis, the following will be qualifying: Diagnosed sleep apnea, nocturia, awaking from sleep gasping or choking (or observed by others gasping or choking during sleep), daytime hypersomnolence, night sweats, or awaking with headache or anxiety. This is exploratory, but each outcome will be stratified by sleep apnea-compatible problems.
3.5, 7 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Principal Investigator: Beatrice A Golomb, MD, PhD, University of California, San Diego

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

September 13, 2024

Primary Completion (Estimated)

December 1, 2027

Study Completion (Estimated)

December 1, 2027

Study Registration Dates

First Submitted

June 10, 2024

First Submitted That Met QC Criteria

July 16, 2024

First Posted (Actual)

July 23, 2024

Study Record Updates

Last Update Posted (Actual)

May 1, 2026

Last Update Submitted That Met QC Criteria

April 27, 2026

Last Verified

April 1, 2026

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Gulf War Syndrome

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