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Related Experiment Video

Updated: Jun 19, 2026

Solid Plate-based Dietary Restriction in Caenorhabditis elegans
06:13

Solid Plate-based Dietary Restriction in Caenorhabditis elegans

Published on: May 28, 2011

Antiaging, longevity and calorie restriction.

John E Morley1, Elie Chahla, Saad Alkaade

  • 1GRECC, VA Medical Center, St. Louis, Missouri, USA. morley@slu.edu

Current Opinion in Clinical Nutrition and Metabolic Care
|October 24, 2009
PubMed
Summary

Calorie restriction shows mixed results in humans, with potential benefits but significant risks like muscle and bone loss, especially in older adults. Exercise may be a safer alternative for longevity in the elderly.

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Area of Science:

  • Gerontology
  • Nutritional Science
  • Longevity Research

Background:

  • The role of calorie restriction (CR) in human longevity is debated.
  • Recent studies in non-human primates and humans offer new perspectives on CR's impact.

Purpose of the Study:

  • To review current data on calorie restriction in humans and its relation to longevity.
  • To assess the benefits and risks of CR, particularly in older populations.

Main Methods:

  • Review of recent studies on calorie restriction in rhesus monkeys and humans.
  • Analysis of controlled human trials examining effects of CR over 6-12 months.

Main Results:

  • Calorie restriction in rhesus monkeys correlated with reduced aging-associated mortality.
  • Human studies indicated potential benefits but also significant adverse effects, including loss of muscle mass, strength, and bone density.
  • CR initiated in older rodents proved ineffective.

Conclusions:

  • Weight loss in individuals over 60 is linked to increased mortality, hip fractures, and institutionalization.
  • Calorie restriction in older adults should be viewed as experimental and potentially hazardous.
  • Exercise is currently recommended as a safer and preferable intervention for longevity in older individuals.