Multi-day fasting can be used to kick off a ketogenic diet or intermittent fasting can support a keto diet.
And though there have been no human brain cancer trials to date, efficacy has been proven in a mouse model and a breast/ovarian cancer study.
- Active Clinical Trials
Intermittent fasting consists of limiting the hours of the day one eats and it appears to provide most/if not all of the benefits of a prolonged fast:
There is also the fasting mimicking diet which was created by Valter Longo, who could be considered the foremost expert on all things calorie restriction and health:
And here's a detailed write-up on Fasting and Cancer from the University of California, San Francisco:
None currently available
Title: Fasting enhances the response of glioma to chemo- and radiotherapy
Summary: Scientists studied the effects of calorie restriction on mouse brain (glial) cancer cells as well as mice with implanted tumors.
- “These results indicate that fasting and fasting-mimicking interventions could enhance the efficacy of existing cancer treatments.”
- Extended fasting increased sensitivity to chemotherapy and radiation
- Mice that underwent fasting conditions lived longer than those that did not
Title: The effects of short-term fasting on quality of life and tolerance to chemotherapy in patients with breast and ovarian cancer: a randomized cross-over pilot study
Summary: This was a randomized study that put patients into either a fasting group or non-fasting group and compared the quality of life for patients undergoing chemotherapy across each group.
- Short-term fasting is well tolerated
- Quality of life appeared to improve
- Fatigue as a result of the chemotherapy lessened in the fasting group
Title: Effects of short-term fasting on cancer treatment
Summary: This study from 2019 conducted a review of the current studies and trials involving fasting to date.
- The initial summarized data is promising
- Fasting protects healthy cells while sensitizing cancer cells to chemotherapy
- Short-term fasting is safe
- Medical use is early though the existing data warrants further trials