Clinical trial Recruiting at 1 site Early Phase 1 Interventional Ages 18 and up Men only

Raising gut Akkermansia muciniphila with oral acetate (apple cider vinegar) during androgen deprivation therapy

Official title: The Role of Akkermansia Muciniphilia in Combating the Metabolic Effects of Androgen Deprivation Therapy in Men With Metastatic Prostate Cancer

Run by Western University · NCT05802121 · Data updated 2026-11-12

This tests whether taking oral acetate (apple cider vinegar) can raise Akkermansia muciniphila levels in the gut and help metabolic and bone health in men starting androgen deprivation therapy for metastatic castration‑sensitive prostate cancer.

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Quick facts

PhaseEarly Phase 1
Study typeInterventional
Ages18 Years and up
SexMen only
Enrollment30 (estimated)
SponsorWestern University
Academic / other
Locations1 site (London, Ontario)
StatusRecruiting
StartedJuly 2, 2025
Main results expectedSeptember 2026
Study endsJune 2027
Registry record updatedAugust 20, 2025
Trial IDNCT05802121 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Men aged 18 or older with histologically confirmed metastatic castration‑sensitive prostate adenocarcinoma who are about to start ADT, can complete required baseline imaging, and can provide informed consent are the intended participants.

Probably not a fit

Patients with primary neuroendocrine prostate cancer, ADT within the past year, significant liver dysfunction, planned or concurrent apple cider vinegar or chromium use, or inability to consent or comply are unlikely to be eligible or receive benefit from this intervention.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This early-phase 1 interventional trial gives oral acetate (as apple cider vinegar) to men with metastatic castration‑sensitive prostate cancer who are starting androgen deprivation therapy and compares them to a standard-of-care arm. The primary aims are to confirm that acetate increases the proportion of Akkermansia muciniphila in stool and to record tolerability and side effects. Secondary outcomes examine whether increased A. muciniphila counts correlate with improvements in metabolic measures and bone health. Enrollment requires baseline imaging and excludes recent ADT, primary neuroendocrine tumors, significant liver dysfunction, and concurrent apple cider vinegar or chromium supplementation.

Why it matters

Potential benefit: If successful, this could offer a simple, low-cost approach to boost a beneficial gut microbe and reduce metabolic and bone complications from androgen deprivation therapy.

How similar studies have gone: Early human and preclinical work has linked higher A. muciniphila or acetate exposure to better metabolic markers, but using oral acetate to boost A. muciniphila specifically in prostate cancer patients on ADT is a novel application.

Who can join: the full rules

Show full inclusion / exclusion criteria
For inclusion in this study, patients must fulfill all of the following criteria:

1. Men ≥18 years of age with histologically-proven metastatic castration-sensitive prostate adenocarcinoma planned to receive ADT (TNM stage Tany, Nany, M1) (see Appendix I).
2. Must have baseline imaging with 1) CT of the abdomen, and pelvis and bone scan or 2) PSMA PET scan

Patients fulfilling any of the following criteria are NOT eligible for participation in this study:

1. Age less than 18
2. Primary neuroendocrine prostate cancer
3. Treatment with ADT within the year leading up to enrolment
4. Planned or concurrent use of chromium supplementation for the study duration
5. Planned or concurrent use of apple cider vinegar supplementation for the study duration
6. Unable to provide informed consent or unable to understand or read the English language (unless accompanied by an interpreter)
7. Inadequate liver function (\>2x upper limit of normal)
8. Any other condition, chronic disease, or lifestyle factor, that, in the opinion of the Qualified Investigator, may adversely affect the participant's ability to complete the study or its measures or pose significant risk to the participant
9. Use of antibiotics that cannot be discontinued for a washout period and remain off them for the duration of the trial

Where it's running

  • London Health Sciences Centre - Victoria Hospital
    London, Ontario, Canada
    Recruiting

Study contacts

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.