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Supplement study sees if testosterone gets a boost

NCT ID NCT06747624

Knowledge-focused Sponsor: Designs for Health 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tested whether a supplement called geranylgeraniol (GG) can raise testosterone levels in healthy men and women aged 40 to 65. Researchers measured total and free testosterone in 34 participants over 18 weeks using a crossover design. The goal was to see if GG improves hormone levels and self-reported health, but this is an early-stage investigation, not a treatment for any disease.

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

34 people

The number who actually took part.

Started

Jan 2025

Finished

Sep 2025

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

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

Ages

40 to 65 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: 1. Males and females between 40 to 65 years of age. 2. Individuals with no significant history of inflammatory bowel disease (i.e. ulcerative colitis, Crohn's, Celiac, etc.), ulcers, liver and/or kidney disease or other any acute or chronic dis-ease. 3. Ability to read and speak English 4. Subject's agreement to voluntarily participate in the study 5. Negative pregnancy test confirmed with serum HCG on initial baseline testing and baseline testing at the start of the crossover (at 10 weeks) Exclusion Criteria: 1. Males and females under 40 or over 65 years of age 2. Previous (in the past 60 days) or current hormone replacement therapy 3. Males and females with free testosterone levels over normal range 4. History of hysterectomy, oophorectomy, or orchiectomy 5. Current biotin supplementation \>3 mg per day one week prior to the start of the study 6. Current or history of smoking 7. CoQ10/Ubiquinol supplementation within the past 2 weeks 8. Current use of hormone boosting supplements (i.e. fenugreek, shilajit, tongkat ali, ashwagandha) within the past 4 weeks 9. Current or previous use of medication - NSAIDS, statins, blood thinners, H2 blockers and PPI or blood sugar-lowering agents. 10. Diabetes 11. Cancer 12. Hemophilia 13. Disorders of heart, kidney, lung or liver function 14. Infectious diseases 15. Alcohol or drug abuse (\>7 drinks per week for men and women) 16. Pregnancy, lactation, or individuals planning to become pregnant in the next 6 months 17. Failure to submit statement of consent 18. Participant in a clinical trial in the previous 30 days.

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As listed by the trial registrant

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

Health Wellness

Contacts and locations

Locations

  • Designs for Health, Inc.

    Palm Coast, Florida, 32164, United States

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