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Status unknownNCT04292041Updated Mar 2, 2020

Fasting Mimicking Diet in Prostate Cancer and Metabolic Syndrome

An observational study in Prostate Cancer, Metabolic Syndrome and Intermittent Fasting, sponsored by Galway Clinic. Status unknown at 1 site in Ireland. Open to male participants. Per ClinicalTrials.gov, last updated 2020-03-02.

Sponsored by Galway Clinic · Observational

The sponsor has not verified this record recently (last verified Feb 2020), so the status shown — last known as Active, not recruiting — may be out of date.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
40
Sex
Male
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Study summary

This is a prospective observational cohort study of patients with prostate cancer who have a metabolic syndrome. The study aims to evaluate the role of intermittent fasting (fasting mimicking diet) in these patients. The primary end point is metabolic health and the secondary endpoint is quality of life.

Read the detailed description

Cancer is a complex set of conditions which collectively comprise the second biggest cause of death in the western world. In addition, these diseases, along with their various treatments, are associated with significant illness, as well as a host of debilitating symptoms. Two very common problems are cancer fatigue, as well as metabolic changes which can cause much suffering in and of themselves. Patients with advanced cancers, as well as many patients undergoing surgery, radiation therapy as well as chemotherapy all complain of fatigue, to a greater or lesser extent. Many gain or lose weight, and develop associated metabolic changes in uninvolved body systems, which can cause a significant health burden on the patients, as well as the healthcare system as a whole.

Little is known about the mechanisms which underlie these symptoms. Various biologic processes have been implicated including inflammation and other changes in body metabolism. There is urgent need to better understand these processes, which cause so much suffering in cancer patients, so as to potentially develop more effective solutions.

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Conditions studied

  • Prostate Cancer
  • Metabolic Syndrome
  • Intermittent Fasting

Keywords

  • Fasting Mimicking Diet
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In context

Prostatic Neoplasms

6,370 studies on the registry are indexed under Prostatic Neoplasms; 1,400 are open to participants now.

This study's planned enrollment of 40 is below the median of 200 across 1,181 observational studies indexed under Prostatic Neoplasms.

Browse Prostatic Neoplasms studies →

Lead sponsor

This is the only study on the registry with Galway Clinic as lead sponsor.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
Male
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

A cohort of 40 men with biopsy-proven prostate cancer having features of a metabolic syndrome, receiving standard treatment options for their disease.

Inclusion criteria

  • Patients with biopsy-proven prostate cancer having features of a metabolic syndrome, receiving standard treatment options for their disease.

Exclusion criteria

Exclusion Criteria:

  • Patients without a diagnosis of prostate cancer
  • Life expectancy less than 1 year
  • Children under the age of 18
  • Individuals who are allergic to nuts or soy
  • Individuals with a Body Mass Index (BMI) \<18.5
  • Individuals who have been severely weakened by a disease or medical procedure
  • Individuals who are taking medications which may not be safely consumed with a calorie restricted diet unless authorised in writing by a licensed physician
  • Individuals with a history of significant cardiac disease, particularly uncompensated congestive heart failure NYHA grade 2 or more or LVEF \<40% on any prior assessment
  • Individuals with a history of syncope (fainting) with calorie restriction or other medical co-morbidities
  • Individuals who have special dietary needs that are incompatible with the ProLon® meal plan
  • Individuals with liver or kidney disorders that may be affected by the very low glucose and protein content of the diet
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Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
40 participants (estimated)
Target follow-up
6 Months
Patient registry
Yes

Interventions

  • OtherFasting mimicking diet

    3 cycles of programmed nutrition using a fasting mimicking diet (Chemolieve (R)), each cycle consisting of 4 days. Pre and post nutritional cycles, clinical and metabolic assessments are taken, as per protocol. Allowing for a 3 month "washout" time, the 'post' assessment is planned approximately 6 months from the initial (pre) assessment.

    Also known as: Programmed cyclic nutrition for 3 monthly cycles (fasting mimicking diet)

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What researchers measure

Primary outcomes

  1. Change in Baseline Weight (in kilograms) at 6 months

    Metabolic health parameter

    Time frame: Baseline and 3 months after Nutritional Cycle 3 (each cycle is 4 days per month), about 6 months

  2. Change in Baseline Blood Pressure (in millimeters of Mercury) at 6 months

    Metabolic health parameter

    Time frame: Baseline and 3 months after Nutritional Cycle 3 (each cycle is 4 days per month), about 6 months

  3. Change in Baseline Waist Circumference (in centimeters) at 6 months

    Metabolic health parameter

    Time frame: Baseline and 3 months after Nutritional Cycle 3 (each cycle is 4 days per month), about 6 months

  4. Change in Baseline Triglycerides Level (in millimoles per litre) at 6 months

    Clinical lab results

    Time frame: Baseline and 3 months after Nutritional Cycle 3 (each cycle is 4 days per month), about 6 months

  5. Change in Baseline Total, LDL, and HDL Cholesterol (in millimoles per litre) at 6 months

    Clinical lab results

    Time frame: Baseline and 3 months after Nutritional Cycle 3 (each cycle is 4 days per month), about 6 months

Secondary outcomes

  1. Change in Baseline EQ5D5L Health Questionnaire Score at 6 months

    Structured Quality of Life Measure - Patients' self report of mobility, self-care, usual activities, pain/discomfort, anxiety/depression - 1. No problem 2. Slight problems 3. Moderate problems 4. Severe problems 5. Unable to/extreme problems * 5 questions * Minimum score of 0, meaning good quality of life * Maximum score of 25, meaning poor quality of life

    Time frame: Baseline and 3 months after Nutritional Cycle 3 (each cycle is 4 days per month), about 6 months

  2. Change in Baseline EQ5D5L Vertical Visual Analogue Scale Score at 6 months

    Structured Quality of Life Measure - Patients' self report on how good/bad their health is TODAY - * One scale numbered from 0 to 100 * Minimum score of 0, meaning the worst health you can imagine * Maximum score of 100, meaning the best health you can imagine

    Time frame: Baseline and 3 months after Nutritional Cycle 3 (each cycle is 4 days per month), about 6 months

  3. Change in Baseline Chalder Fatigue Index Score at 6 months

    Structured Tiredness/Fatigue Measures on Likert Scale - Patients' self report of fatigue symptoms - 0: Less than usual 1. No more than usual 2. More than usual 3. Much more than usual * 6 questions * minimum score of 0, meaning no fatigue due to illness * maximum score of 18, meaning chronic fatigue due to illness

    Time frame: Baseline and 3 months after Nutritional Cycle 3 (each cycle is 4 days per month), about 6 months

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Study locations

1 site
  • Galway Clinic
    Galway, Ireland
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References and documents

Publications

  • Brandhorst S, Longo VD. Protein Quantity and Source, Fasting-Mimicking Diets, and Longevity. Adv Nutr. 2019 Nov 1;10(Suppl_4):S340-S350. doi: 10.1093/advances/nmz079. PubMed 31728501 ↗
  • Fontana L, Partridge L, Longo VD. Extending healthy life span--from yeast to humans. Science. 2010 Apr 16;328(5976):321-6. doi: 10.1126/science.1172539. PubMed 20395504 ↗
  • Mirzaei H, Suarez JA, Longo VD. Protein and amino acid restriction, aging and disease: from yeast to humans. Trends Endocrinol Metab. 2014 Nov;25(11):558-66. doi: 10.1016/j.tem.2014.07.002. Epub 2014 Aug 19. PubMed 25153840 ↗
  • Fay-Watt V, O'Connor S, Roshan D, Romeo AC, Longo VD, Sullivan FJ. The impact of a fasting mimicking diet on the metabolic health of a prospective cohort of patients with prostate cancer: a pilot implementation study. Prostate Cancer Prostatic Dis. 2023 Jun;26(2):317-322. doi: 10.1038/s41391-022-00528-3. Epub 2022 Mar 21. Erratum In: Prostate Cancer Prostatic Dis. 2023 Jun;26(2):435. doi: 10.1038/s41391-022-00540-7. PubMed 35314788 ↗

Individual participant data

Plan to share: No — None planned

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 2, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04292041
Lead sponsor
Galway Clinic
Responsible party
Professor Frank Sullivan (Medical Director, Department of Radiation Oncology, Galway Clinic) — Principal investigator
First posted
Mar 2, 2020
Start date
Jan 15, 2019
Primary completion
Jun 15, 2020 (estimated)
Completion
Jun 15, 2020 (estimated)
Last update
Mar 2, 2020

Study contacts

Frank Sullivan, MSc
principal investigator · Galway Clinic

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

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