What does science say about Fasting and fasting-mimicking diet and cancer (all types)?
- We don’t say yes or no. We show what has been studied.
- Working in a lab or in animals does not mean it works in people.
- Don’t stop or change your treatment without talking to your doctor.
What has been studied
- Lab studies (cells)Tests on cells in a dish.Source: PubMed · as of 6 Nov 2026 · Open the search at PubMed11studies
- Animal studiesTests in mice, rats or other animals.Source: PubMed · as of 6 Nov 2026 · Open the search at PubMed123studies
- Studies in peoplePublished studies with human participants.Source: PubMed · as of 6 Nov 2026 · Open the search at PubMed300studies
- Registered trials in peopleTrials entered in a public registry, whatever their result.ClinicalTrials.gov: 33 · as of 6 Nov 2026 · Open the search at ClinicalTrials.govEU CTIS: 6 · as of 6 Nov 2026 · Open the search at EU CTISBy phase:No phase (26)Phase 2 (7)Phase 1 (6)By status:Recruiting (20)Completed (11)Not yet recruiting (5)Running, not recruiting (3)Countries (10):United States (22)Romania (5)China (4)Italy (2)Australia (1)Belgium (1)Canada (1)Germany (1)United Kingdom (1)South Korea (1)With a linked publication (results): 3 of 39The registries do not tell us here whether results were posted; a linked publication is shown instead.39trials
- Approved treatmentApproved by a medicines regulator for this disease.No
Cancer here means all 33 cancer types we cover.
Examples of what we found
The trials
Phase 1
An open label, balanced, randomized, two-treatment, two-period, two-sequence, single-dose, crossover bioequivalence study comparing Trametinib tablets 2 mg, Manufactured by Sun Pharmaceutical Industries Limited, India with MEKINIST® (Trametinib) tablets 2 mg, Distributed by: Novartis Pharmaceuticals Corporation, East Hanover, New Jersey 07936, USA in healthy, adult, human subjects under fasting condition.
Not yet recruiting · Romania
EU CTIS · 2025-524267-20-00No phase
Pilot Study of Intermittent Fasting With Immune Checkpoint Inhibitors
Not yet recruiting
ClinicalTrials.gov · NCT07645742No phase
Evaluating Intermittent Fasting In Individuals At High Risk ForPancreatic Cancer Undergoing Screening
Recruiting · United States
ClinicalTrials.gov · NCT07513116No phase
Fast-Her: Fasting Effects on Breast Cancer Treatment
Recruiting · United States
ClinicalTrials.gov · NCT07624617Phase 2
FMD and Neoadjuvant Chemo-immunotherapy in TNBC
Recruiting · China
ClinicalTrials.gov · NCT07378306No phase
Fasting InTervention for Endometrial Cancer
Recruiting · United States
ClinicalTrials.gov · NCT07622901No phase
7-Days Water-Only Fasting or Ketone Supplementation Trial in Prostate Cancer
Recruiting · United States
ClinicalTrials.gov · NCT06826924Phase 1
A Phase 1, First-in-human Study of OKN4395 and Pembrolizumab in Patients With Solid Tumors
Recruiting · Australia, United Kingdom, United States
ClinicalTrials.gov · NCT06789172No phase
Fasting During Neoadjuvant Chemotherapy in Patient With Epithelial Ovarian Cancer
Recruiting · United States
ClinicalTrials.gov · NCT06386887No phase
Fasting Mimicking Diet (FMD) in Conjunction With Chemotherapy in Advanced Ovarian Cancer
Not yet recruiting · United States
ClinicalTrials.gov · NCT05921149No phase
Intermittent Fasting in Prostate Cancer Patients Receiving Androgen Deprivation Therapy
Recruiting · United States
ClinicalTrials.gov · NCT06172283No phase
Alternate Day Fasting After Surgery for Patients Undergoing Chemotherapy
Recruiting · United States
ClinicalTrials.gov · NCT05990426No phase
Effect of FMD on Colorectal Cancer Patients
Running, not recruiting · China
ClinicalTrials.gov · NCT05384444No phase
Short-term Fasting Compared to Free Diet on Ovarian Cancer Patients
Recruiting · Italy
ClinicalTrials.gov · NCT07039331No phase
Caloric Restriction In Sarcoma Patients Treated With Pre-Operative RT
Recruiting · United States
ClinicalTrials.gov · NCT02792270Phase 1
An open label, balanced, randomized, two-treatment, two-period, two-sequence, single-dose, crossover, bioequivalence study comparing Ponatinib Tablets 15 mg, manufactured by Sun Pharmaceutical Industries Limited, India with Iclusig (Ponatinib hydrochloride) tablets 15 mg, Produced by: Patheon Inc. Mississauga, Canada or Takeda Ireland Limited Bray, Ireland, Imported and registered by: Pint Pharma Medical-Hospital and Pharmaceutical Products Ltd. Nelson Pontes Street, 125, Block 03, Jardim Margarida Zip Code 06739-024, Vargem Grande Paulista – SP CNPJ No. 21,896,000/0001-91, in healthy adult, human subjects under fasting condition.
Completed · Romania
EU CTIS · 2025-524311-37-00Phase 1
An open label, balanced, randomized, two-treatment, two-period, two-sequence, single-dose, crossover, bioequivalence study comparing Ruxolitinib Tablets, 20 mg, manufactured by Sun Pharmaceutical Industries Limited, India with JAKAVI (ruxolitinib) tablets 20 mg, (each Jakavi 20 mg tablet contains 26.40 mg of ruxolitinib phosphate equivalent to 20 mg of ruxolitinib). Imported by: Novartis Biociências SA Av. Prof. Vicente Rao, 90 - São Paulo - SP CNPJ: 56.994.502/0001-30. Manufactured by: Novartis Pharma Stein AG, Stein – Switzerland, in healthy adult, human subjects under fasting condition.
Completed · Romania
EU CTIS · 2024-519801-36-00Phase 1
An open label, balanced, randomized, two-treatment, two-period, two-sequence, single dose crossover bioequivalence study comparing Enzalutamide film coated tablets 80 mg, Manufactured for Sun Pharmaceutical Industries Limited, India with XTANDI (Enzalutamide) 80 mg film coated tablets, Made by: Patheon Inc., 2100 Syntex Court, Mississauga, Ontario – Canada, Imported and registered by: Astellas Farma Brasil Importação e Distribuição de Medicamentos Ltda., São Paulo-SP, Brazil, in healthy adult, male subjects under fasting condition.
Completed · Romania
EU CTIS · 2024-518209-16-00Phase 1
An open label, balanced, randomized, two-treatment, two-period, two-sequence, single dose crossover bioequivalence study comparing Enzalutamide film coated tablets 160 mg, Manufactured for Sun Pharmaceutical Industries Limited, India with XTANDI (Enzalutamide) 80 mg film coated tablets, Made by: Patheon Inc., 2100 Syntex Court, Mississauga, Ontario – Canada, Imported and registered by: Astellas Farma Brasil Importação e Distribuição de Medicamentos Ltda., São Paulo-SP, Brazil, in healthy adult, male subjects under fasting condition.
Completed · Romania
EU CTIS · 2024-518211-20-00No phase
A Prolonged Nightly Fasting for Men on ADT for PCa
Completed · United States
ClinicalTrials.gov · NCT07462403No phase
A Case Crossover Study of Intermittent Fasting in CLL/SLL
Completed · Canada
ClinicalTrials.gov · NCT05708326No phase
PROFAST Intervention in Precursor Multiple Myeloma
Completed · United States
ClinicalTrials.gov · NCT05565638No phase
Effect of Prolonged Nightly Fasting on Immunotherapy Outcomes in HNSCC - Role of Gut Microbiome
Completed · United States
ClinicalTrials.gov · NCT05083416No phase
Feasibility of Fasting & Exercise in Pts With HR+ MBC
Completed · United States
ClinicalTrials.gov · NCT04708860
Thinking of paying for it? Read this first
- Ask for published results. Stories, thank-you letters and "patients report" are not results. Ask where the results were published.
- Know what you pay for. Ask in writing: what exactly is included, who gets the money, and what happens if you stop.
- Ask your own doctor first. Some products interfere with chemotherapy, radiation or other medicines. Your treating doctor can check this.
- Do not stop standard treatment for it. Do not stop or delay your treatment without talking to your care team.
Not medical advice. Talk to the care team before changing treatment.