Suspended

A Prospective Pilot Study Evaluating the Feasibility of Daily, Long-Term Intermittent Fasting for Men on PSA Surveillance Following Radical Prostatectomy for Localized, High-Risk Prostate Cancer

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What is being tested

Food Diary

+ Preventative Dietary Intervention

+ Questionnaire Administration

Other
Who is being recruted

Urogenital Diseases+7

+ Genital Diseases

+ Genital Diseases, Male

Over 18 Years
See all eligibility criteria
How is the trial designed

Prevention Study

Early Phase 1
Interventional
Study Start: January 2020
See protocol details

Summary

Principal SponsorMayo Clinic
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: January 8, 2020

Actual date on which the first participant was enrolled.

PRIMARY OBJECTIVES: I. To determine whether men treated for localized prostate cancer adhere to a long-term (months-years) daily intermittent fasting regimen. II. To measure the levels of metabolic and prostate-cancer derived microparticles in the serum of men that practice a daily intermittent fasting regimen after treatment for localized, high-risk prostate cancer. OUTLINE: Beginning when patients' PSA is detectable up to 24 months after surgery, patients follow a daily intermittent fasting routine consisting of restricting the daily eating period to 8 hours (e.g. between 1PM-9PM) followed by 16 hours of prolonged nightly fasting for up to 1 year or until secondary therapy commences.

Official TitleA Prospective Pilot Study Evaluating the Feasibility of Daily, Long-Term Intermittent Fasting for Men on PSA Surveillance Following Radical Prostatectomy for Localized, High-Risk Prostate Cancer
NCT04288336
Principal SponsorMayo Clinic
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

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

Prevention Study

Prevention studies aim to stop a disease from developing. They often involve people at risk and test things like vaccines, lifestyle changes, or preventive medications.



Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Male

Biological sex of participants that are eligible to enroll.

Over 18 Years

Range of ages for which participants are eligible to join.

Healthy volunteers not allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

Urogenital DiseasesGenital DiseasesGenital Diseases, MaleGenital Neoplasms, MaleNeoplasmsNeoplasms by SiteProstatic DiseasesProstatic NeoplasmsUrogenital NeoplasmsMale Urogenital Diseases

Criteria

Inclusion Criteria: * Biopsy-proven histological diagnosis of localized prostate cancer (pT2 or specimen confined pT3) * Having undergone radical prostatectomy (open or laparoscopic) with bilateral pelvic lymph node dissection * Negative surgical margins on final specimen * Men that decline adjuvant therapy * Detectable serum PSA of 0.1 ng/mL or \> * 24 months or less since radical prostatectomy at time of study screening Exclusion Criteria: * Unable or unwilling to provide informed consent * Treated prior to surgery with any form of hormone, antiandrogen, or androgen deprivation therapy * Treated prior to surgery with any form of chemotherapy or radiotherapy * Medical conditions/history that precludes subjects from following a fasting regimen, including but not limited to: * Diabetes mellitus * On hormone therapy (Casodex, gonadotrophin releasing hormone \[GnRH\] agonist/antagonist)

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Treatment Groups
Study Objectives

One single intervention group is designated in this study

This study does not include a placebo group 

Treatment Groups

Group I

Experimental
Beginning when patients' PSA is detectable up to 24 months after surgery, patients follow a daily intermittent fasting routine consisting of restricting the daily eating period to 8 hours (e.g. between 1PM-9PM) followed by 16 hours of prolonged nightly fasting for up to 1 year or until secondary therapy commences.

Study Objectives

Primary Objectives

Secondary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 1 location

Suspended

Mayo Clinic

Rochester, United StatesOpen Mayo Clinic in Google Maps
SuspendedOne Study Center