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Updated: Sep 29, 2025
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Assessment of the Metabolic Effects of Isocaloric 2:1 Intermittent Fasting in Mice
Published on: November 27, 2019
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Intermittent and periodic fasting, longevity and disease
Valter D Longo1,2, Maira Di Tano2, Mark P Mattson3
1Longevity Institute, Leonard Davis School of Gerontology and Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA.
Nature Aging
|March 21, 2022
Summary
Intermittent fasting (IF) and periodic fasting (PF) show promise for enhancing longevity and healthspan by influencing cellular aging. These safe fasting strategies may help prevent and treat various diseases with minimal side effects.
Area of Science:
- Cellular biology
- Metabolism
- Aging research
Background:
- Intermittent fasting (IF) and periodic fasting (PF) are increasingly recognized for their potential health benefits.
- These dietary strategies are associated with improved longevity and healthspan.
- The molecular mechanisms underlying these effects are still under investigation.
Purpose of the Study:
- To describe various IF and PF methods.
- To explore the effects of fasting on longevity across different organisms.
- To link fasting to nutrient-sensing pathways and discuss therapeutic potential.
Main Methods:
- Review of existing literature on IF and PF.
- Analysis of effects on longevity from yeast to humans.
- Examination of nutrient-sensing signaling pathways.
- Discussion of fasting and refeeding periods.
Main Results:
- IF and PF are safe strategies affecting longevity and healthspan.
- Fasting impacts cellular aging and disease risk factors with minor side effects.
- Specific IF (12-48 hours, weekly) and PF (2-7 days, monthly) protocols are defined.
Conclusions:
- IF and PF offer therapeutic potential for diseases including cancer, autoimmunity, neurodegeneration, and metabolic/cardiovascular conditions.
- Understanding the molecular mechanisms of fasting and refeeding is crucial.
- Further research is needed to fully unravel the benefits and potential side effects.
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