Clinical trial No longer in our active list Interventional Ages 18 and up

Testing overnight fasting for childhood cancer survivors

Official title: Overnight Fasting After Completion of Therapy: The OnFACT Study

Run by Memorial Sloan Kettering Cancer Center · NCT03523377 · Data updated 2026-05-14

This study is no longer in our active list. It may have stopped recruiting or finished. The details below are as of 2026-05-14 and are kept for reference. Check ClinicalTrials.gov for its current status, or see similar studies below.

This study is testing if having childhood cancer survivors fast overnight for at least 14 hours can improve their health and blood sugar levels compared to their usual eating habits.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment40 (estimated)
SponsorMemorial Sloan Kettering Cancer Center
Academic / other
Drugs / interventionschemotherapy, radiation, prednisone
Locations1 site (New York, New York)
Trial IDNCT03523377 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are English-speaking adults aged 18 and older who have a history of cancer treatment and meet specific health criteria.

Probably not a fit

Patients currently on antidiabetic medications or those unable to fast for medical reasons may not benefit from this study.

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

What this trial studies

This study investigates the feasibility and potential benefits of intermittent fasting, specifically not eating for at least 14 hours overnight, in childhood cancer survivors. Participants will be monitored to assess changes in blood sugar levels and overall health outcomes. The intervention involves prolonged overnight fasting compared to usual care, with participants required to wear a mobile health device to track their fasting periods. The study aims to determine if this dietary approach can be safely integrated into the lives of survivors who have completed their cancer treatment.

Why it matters

Potential benefit: If successful, this approach could improve blood sugar control and overall health in childhood cancer survivors.

How similar studies have gone: While intermittent fasting has been studied in various populations, this specific approach in childhood cancer survivors is novel and has not been extensively tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Body mass index is ≥ 18.5 kg/m\^2
* History of treatment for cancer or related illness diagnosed at ≤ 25 years old
* Off cytotoxic therapy for primary cancer ≥ 2 years
* Not receiving cytotoxic therapy (chemotherapy, external beam radiation therapy) at the time of study enrollment
* History of radiation to the chest, abdomen or total body
* Current age ≥18 years
* English-speaking
* Personal phone with SMS text messaging capability
* Willingness to wear an mHealth device, such as a FitBit, for two 7-day periods
* Able to perform all study requirements

Exclusion Criteria:

* Use of any antidiabetic, weight loss, or appetite control medication
* Use of any other medication that could impact dietary intake, such as prednisone
* Currently fasts 12 hours or more by self-report
* Unable to fast due to medical reason such as pregnancy

Where it's running

  • Memorial Sloan Kettering Cancer Center
    New York, New York, United States
    Recruiting

Study contacts

  • Principal investigator: Danielle Friedman, MD, MS — Memorial Sloan Kettering Cancer Center
  • Study coordinator: Danielle Friedman, MD, MS
  • Email: friedmad@mskcc.org
  • Phone: 212-639-7376

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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.