In rhesus monkeys, a diet with fewer calories does not raise the likelihood of dying from causes unrelated to aging, because the rate of such deaths relative to total lifespan is the same as in...
Mechanism
Synthesis from 1 study
Eating less keeps the body's energy system running more smoothly, which protects organs from sudden damage. This means animals don't become more likely to die from accidents or sudden illnesses, even if those events happen more often — because their bodies are better able to handle them.
Most probable mechanism
Eating fewer calories keeps the body's energy use steady and reduces sudden stress on organs and tissues, which prevents accidents or sudden failures that cause early death. The body stays more balanced, so it doesn't become more vulnerable to random harmful events.
Reduced energy intake lowers circulating glucose and insulin levels, decreasing metabolic flux through glycolytic and lipogenic pathways.
Lower metabolic flux reduces oxidative damage to cellular components, including mitochondrial membranes and DNA repair enzymes.
Decreased cellular damage preserves organ function and structural integrity in high-stress tissues such as liver, heart, and vasculature.
Preserved organ function maintains homeostatic resilience during acute physiological challenges, such as infection, trauma, or environmental stress.
Evidence from Studies
Supporting (1)
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Caloric restriction reduces age-related and all-cause mortality in rhesus monkeys
Contradicting (0)
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Gold Standard Evidence Needed
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