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.
See the scientific wording
In male grey mouse lemurs, chronic 30% caloric restriction is associated with preserved white matter volume in the genu and splenium of the corpus callosum and the fimbria hippocampi, and with accelerated loss of grey matter in the hippocampus, entorhinal cortex, and retrosplenial cortex over a four-year aging period.
Correlational — new studies may shift this
Randomized trialsOne low-scoring study links this claim to the outcome, but causation is not established.
What the research says
1 study reviewedSupporting (1)
Caloric restriction increases lifespan but affects brain integrity in grey mouse lemur primates
Cohort StudyAnimal2018
Eating 30% less food helped these tiny primates live longer and kept the brain's wiring (white matter) healthier, but made the brain's processing centers (grey matter) shrink faster — yet their thinking skills stayed the same.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
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Scores reflect study quality, not just count.
Eating less food slows down the breakdown of the brain's wiring by reducing damage to the fatty insulation around nerve fibers, but it speeds up the shrinking of brain cells in areas that handle memory and thinking because those cells get fewer signals to stay healthy and connected.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting study
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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.
Mechanism
1 studyEating less food protects the brain's wiring by reducing damage to the fatty coating around nerve fibers, but it causes brain cells in memory areas to shrink faster because they receive fewer signals to stay healthy. The brain keeps working normally even as it loses structure in some places.
Eating less food slows down the breakdown of the brain's wiring by reducing damage to the fatty insulation around nerve fibers, but it speeds up the shrinking of brain cells in areas that handle memory and thinking because those cells get fewer signals to stay healthy and connected.
Chronic caloric restriction lowers systemic metabolic rate and reduces oxidative stress throughout the body
Reduced oxidative stress decreases microglial activation and protects oligodendrocytes from age-related damage
Preserved oligodendrocyte function maintains myelin integrity in long-range axonal tracts, including the corpus callosum and fimbria hippocampi
Caloric restriction alters neurotrophic signaling and insulin/IGF-1 pathways in the brain, reducing support for neuronal maintenance in vulnerable regions
Neurons in the hippocampus, entorhinal cortex, and retrosplenial cortex undergo atrophy, dendritic retraction, and reduced synaptic turnover due to diminished trophic support
Accelerated loss of neuronal volume and synaptic density leads to measurable grey matter reduction in these regions
Evidence from Studies
Supporting (1)
Community contributions welcome
Eating 30% less food helped these tiny primates live longer and kept the brain's wiring (white matter) healthier, but made the brain's processing centers (grey matter) shrink faster — yet their thinking skills stayed the same.
Contradicting (0)
Community contributions welcome
Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review of Long-Term Caloric Restriction Effects on Brain White and Grey Matter in Non-Human Primates and Rodents
Population: Male grey mouse lemurs; Intervention: Chronic 30% caloric restriction; Comparator: Ad libitum-fed controls; Outcomes: White matter volume in genu, splenium, and fimbria hippocampi; Grey matter volume in hippocampus, entorhinal cortex, and retrosplenial cortex; Duration: Four years; Analysis: Meta-analysis of longitudinal MRI data across published studies.
Longitudinal Cohort Study of Caloric Restriction and Brain Morphology in Male Grey Mouse Lemurs Over Four Years
Population: Male grey mouse lemurs; Intervention: Chronic 30% caloric restriction; Comparator: Ad libitum-fed controls; Outcomes: Serial MRI measurements of white and grey matter volume in specified regions; Duration: Four years; Design: Prospective longitudinal observation with baseline and annual imaging.
Case-Control Study Comparing Brain Tissue Volume in Aged Male Grey Mouse Lemurs with and without Chronic Caloric Restriction
Population: Male grey mouse lemurs aged four years; Cases: Animals subjected to 30% caloric restriction; Controls: Ad libitum-fed animals; Outcomes: Post-mortem or terminal MRI-measured white and grey matter volume in specified regions; Design: Retrospective comparison of tissue volume between groups.
Cross-Sectional Analysis of Brain Tissue Volume in Male Grey Mouse Lemurs Under Chronic Caloric Restriction vs. Control Diets
Population: Male grey mouse lemurs at four years of age; Intervention: Chronic 30% caloric restriction vs. ad libitum feeding; Outcomes: Single-time-point MRI measurements of white and grey matter volume in specified regions; Design: Snapshot comparison of two groups without longitudinal tracking.
Single-Center Animal Study Measuring Regional Brain Tissue Changes in Male Grey Mouse Lemurs After Four Years of 30% Caloric Restriction
Population: Male grey mouse lemurs; Intervention: Chronic 30% caloric restriction; Comparator: Ad libitum-fed controls; Outcomes: Post-mortem histological or MRI quantification of white and grey matter volume in specified regions; Duration: Four years; Design: Single-group comparison with controlled environment and standardized imaging.