ClinicalTrials.gg
RecruitingNCT06645093FasteStudienUpdated Aug 20, 2026

Feasibility of Intermittent Fasting During Chemotherapy

An interventional study of Fasting in Lymphoma, Cancer and Fasting, sponsored by University of Oslo. Recruiting at 1 site in Norway. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2026-08-20.

Sponsored by University of Oslo · Not applicable, Interventional, and Supportive care

From the registry’s dates

  • Started Oct 2024; still recruiting 2 years later.
Phase
Not applicable
Study type
Interventional
Enrollment
40
Allocation
Randomized
Ages
18 Years to 80 Years
Sex
All
01

Study summary

The goal of this randomized controlled parallel group trial is to examine if fasting before and after chemotherapy is safe, feasible and acceptable. The study population will include patients with either Hodgkin lymphoma or Diffuse Large B Cell Lymphoma.

The main questions aimed to answer are:

Whether fasting during chemotherapy is safe for patients, whether it is feasible to implement in a clinical setting, and whether patients find it acceptable.

We also want to examine a number of patient-reported outcome measures regarding health status and quality of life, such as dietary intake and adverse events from chemotherapy.

Researchers will compare fasting to standard treatment.

Participants will:

  • Fast 24 hours before and 24 hours after chemotherapy in addition to standard treatment or receive only standard treatment
  • Keep a diary of their dietary intake 24 hours before and 24 hours after chemotherapy
  • Keep a diary of their dietary intake for three consecutive days between chemotherapy cycles
  • Answer questionnaires/questions in relation to side effects from fasting, side effects/adverse events of chemotherapy, quality of life
  • Take bioimpedance analysis (including body mass index and body composition)
  • Take blood- and feces samples
02

Conditions studied

  • Lymphoma
  • Cancer
  • Fasting

Keywords

  • Chemotherapeutic Toxicity
  • Chemotherapy
  • Adverse Effect
  • Short-term fasting
  • Feasibility studies
  • Fasting
03

In context

Lymphoma

3,018 studies on the registry are indexed under Lymphoma; 434 are open to participants now.

This study's planned enrollment of 40 is close to the median of 43 across 2,319 interventional studies indexed under Lymphoma.

Browse Lymphoma studies →

Lead sponsor

University of Oslo is the lead sponsor of 177 studies on the registry; 24 are open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Patients diagnosed with diffuse large B-cell lymphoma planned to receive R-CHOP (rituximab, vincristine, doxorubicin, cyclophosphamide, and prednisolone) and Hodgkin lymphoma receiving ABVD (doxorubicin, bleomycin, vinblastine and dacarbazine)
  • Age ≥ 18 years
  • status 0-2
  • Normal weight and overweight ( ≥ 18,5 kg/m\^2)

Exclusion criteria

Exclusion Criteria:

  • Receiving concurrent radiation therapy and/or treatment
  • Other concomitant disease that may make intermittent fasting complicated such as diabetes mellitus
  • status: > 3
  • \< 18,5 kg/m2
  • Age > 80 years
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

05

Study design

Phase
Not applicable
Primary purpose
Supportive care
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
40 participants (estimated)

Study arms

  • Experimental
    Fasting group

    This group will fast 24 hours before and 24 hours after chemotherapy for all treatment cycles (4-6 cycles).

    Other: Fasting

  • No intervention
    Control group

    This group will receive standard treatment, which include no fasting.

Interventions

  • OtherFasting

    Fasting implies 0 kilojoule. Water ad libitum is permitted.

06

What researchers measure

Primary outcomes

  1. Safety, measured as 1) number of adverse events

    To test whether fasting is safe. 1) Explored by investigating adverse events from intermittent water-only fasting

    Time frame: 1 year

  2. Safety, measured as 2) changes in body weight

    To test whether fasting is safe. 2) by investigating changes in body weight throughout the treatment comparing the intervention and control groups.

    Time frame: 1 year

  3. Feasibility,- measured by 1) recruitment (attrition rate)

    Whether fasting is feasible. Explored in order to determine whether a larger trial can be successfully conducted in a similar setting with lymphoma patients fasting during cancer treatment.

    Time frame: 1 year

  4. Feasibility,- measured as 2) compliance

    Whether fasting is feasible. Explored in order to determine whether a larger trial can be successfully conducted in a similar setting with lymphoma patients fasting during cancer treatment.

    Time frame: 1 year

  5. Acceptability,- patient burden, acceptance and experience

    Whether fasting is acceptable. Explored from a perspective of the participant, as the degree to which patients find the trial, its procedures, and its interventions agreeable, suitable, and satisfactory during chemotherapy treatment

    Time frame: 1 year

Secondary outcomes

  1. Adverse events from chemotherapy

    Adverse events including number of infections, graded according to Common Terminology Criteria for Adverse Events

    Time frame: 1 year

  2. Toxicity, including hematological toxicity and standard organ toxicity

    Evaluation of toxicity, including hematological toxicity and other relevant organ toxicities with blood test and using computer tomography (CT) or fluoro-deoxy-glucose positron emission tomography computer tomography (FDG-PET-CT)

    Time frame: 1 year

  3. Health-Related Quality of Life

    By using EORTC QLQ-C30 questionnaire

    Time frame: 1 year

  4. Nutritional impact symptoms

    The linguistic and content validation of the translated and culturally adapted Patient Generated Subjective Global Assessment (PG-SGA) will be utilized for gathering data on nutritional impact symptoms

    Time frame: 1 year

  5. Dietary intake

    Dietary intake 24 hours before and 24 hours after chemotherapy and the usual intake between chemotherapy cycles using food diary.

    Time frame: 1 year

  6. Weight loss, body mass index (BMI) and body compositon

    Bioelectrical impedance (BIA) will be used to collect data to explore changes in body weight, BMI and body composition.

    Time frame: 1 year

  7. Unplanned readmissions and hospitalization

    In terms of numbers of readmissions, unplanned out- or inpatient visits, and days in the hospital

    Time frame: 1 year

Other outcomes

  1. Mechanistic aspects of fasting

    To better understand nutrition and metabolism related to fasting and cancer, we want to examine various biomarkers related to glucose, amino acid and fat metabolism, and inflammation, such as e.g. glucose, insulin, amino acids, triglycerides, C-reactive protein (CRP).

    Time frame: 1 year

  2. Fasting and microbiota

    We will analyze the gut microbiota to explore the effect of fasting on the gut microbiota. We will collect feces samples at start and end of treatment to characterize the microbiota using high throughput sequencing.

    Time frame: 1 year

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 20, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06645093
Lead sponsor
University of Oslo
Collaborators
Oslo University Hospital, St. Olavs Hospital, Akershus University Hospital Trust
Responsible party
Sonja H. Brunvoll, PhD (Postdoctoral researcher Sonja H. Brunvoll, PhD (co-PI together with Inger Ottestad, PhD), University of Oslo) — Principal investigator
First posted
Oct 16, 2024
Start date
Oct 31, 2024
Primary completion
Dec 2026 (estimated)
Completion
Dec 2026 (estimated)
Last update
Aug 20, 2026

Study contacts

Sonja Brunvoll, PhD
Contact
s.h.brunvoll@medisin.uio.no
+4792087911
Inger Ottestad, PhD
Contact
i.o.ottestad@medisin.uio.no
+4799735017
Sonja Brunvoll, PhD
principal investigator · Department of Nutrition, University of Oslo
Inger Ottestad, PhD
principal investigator · Department of Nutrition, University of Oslo

Oversight

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

Interested in this study?

Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.

Contact study team

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion