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Claim
Strong Support
correlational
Analysis v4

Male grey mouse lemurs that eat 30% fewer calories starting in early adulthood live 50% longer on average and die less frequently from age-related causes compared to those eating normally.

18
Pro
0
Against

Mechanism

Synthesis from 1 study

How it works

Eating less food slows down harmful processes in the body that cause aging, like cell damage and inflammation. This keeps vital tissues healthier for longer, allowing the animal to live more years without serious illness. Some parts of the brain shrink faster, but this does not affect thinking or...

Most probable mechanism

In Simple Terms

Eating 30% less food lowers the body's energy use and reduces harmful byproducts from metabolism, which decreases damage to cells and tissues. This slows the breakdown of protective insulation around nerve fibers and reduces disease-causing inflammation, allowing the body to stay healthier longer and live more years.

Causal chain
1

Chronic caloric restriction lowers systemic metabolic rate and reduces the production of reactive oxygen species

Verified by multiple studies
which leads to
2

Reduced oxidative stress decreases chronic inflammation and limits activation of microglia and damage to oligodendrocytes

Verified by multiple studies
which leads to
3

Preserved oligodendrocyte function and myelin integrity slow the atrophy of white matter in critical neural tracts

Verified by multiple studies
which leads to
4

Lowered systemic inflammation and reduced cellular damage delay the onset and progression of age-related diseases

Verified by multiple studies
which leads to
5

Delayed disease progression extends median lifespan and reduces age-related mortality

Verified by multiple studies

Less supported by current evidence, but not ruled out

In Simple Terms

Reduced food intake lowers signals that maintain brain cell structure and connections, causing some brain regions to shrink faster even as the rest of the body stays healthier.

Causal chain
1

Caloric restriction alters insulin/IGF-1 and neurotrophic signaling pathways in the brain

Supported by evidence
which leads to
2

Neurons in the hippocampus and entorhinal cortex undergo atrophy, dendritic retraction, or reduced synaptic turnover

Supported by evidence
which leads to
3

Accelerated loss of grey matter volume occurs in specific brain regions despite extended lifespan

Supported by evidence

Evidence from Studies

Supporting (1)

18

Community contributions welcome

18

Caloric restriction increases lifespan but affects brain integrity in grey mouse lemur primates

Cohort Study
Animal
2018

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

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Source Study

Caloric restriction increases lifespan but affects brain integrity in grey mouse lemur primates

Score: 18
DOI: 10.1038/s42003-018-0024-8

Similar Assertions

In male grey mouse lemurs, eating 30% fewer calories over a long period leads to fewer deaths from age-related diseases like cancer and kidney disease compared to lemurs that eat normally.

18
0
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Rhesus monkeys that ate 30% fewer calories than normal, starting between ages 7 and 14 and continuing for more than 20 years, died from age-related causes at 2.9 times lower rates and from any cause at 1.8 times lower rates than monkeys that ate without restriction.

19
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In rhesus monkeys, reducing calorie intake lowers death rates from aging and increases lifespan, showing that how diet affects aging is similar in primates and other animals with shorter lives.

19
0
76%

Rhesus monkeys fed a reduced-calorie diet lived longer than the typical lifespan of 26 years seen in monkeys fed normally at the same research center.

19
0
74%

In male grey mouse lemurs, a 30% reduction in food intake over four years is linked to maintained white matter in certain brain regions but greater loss of grey matter in the hippocampus, entorhinal cortex, and retrosplenial cortex.

18
0
74%