The Study
Caloric restriction increases lifespan but affects brain integrity in grey mouse lemur primates
This study watched a group of tiny primates eat either a normal diet or less food for years and noticed that the ones eating less lived longer and had different brain changes. But it didn't prove that eating less caused those changes—maybe other things like their genes or environment played a role.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
Scientists fed some tiny primates 30% less food than usual and watched what happened as they aged. The少吃 group lived longer and got sick less often, but their brains lost more gray matter in areas linked to memory — even though they still remembered things just as well.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 518 / 100
Quality score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Key takeaways
Summary
Based on the study abstract and findings.
- 1This suggests that in primates, calorie restriction might extend life and reduce some diseases even if it causes unexpected brain changes — and those changes don’t always hurt memory.
- 2Lifespan increased from 6.4 to 9.6 years (50% longer).
- 3Grey matter shrank faster in the hippocampus and cortex.
- 4White matter was preserved.
- 5Memory and motor skills stayed the same.
- 6Cancer/nephritis deaths dropped from 73% to 33%.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Communications Biology
Year
2018
Authors
F. Pifferi, J. Terrien, J. Marchal, Alexandre Dal‐Pan, Fathia Djelti, I. Hardy, S. Chahory, N. Cordonnier, L. Desquilbet, M. Hurion, A. Zahariev, I. Chery, P. Zizzari, M. Perret, J. Epelbaum, S. Blanc, J. Picq, M. Dhenain, F. Aujard
Related Content
Claims (5)
Reducing calorie intake in laboratory animals results in a longer lifespan.
In male grey mouse lemurs, a 30% reduction in calorie intake over time does not change performance on tests of spatial or working memory, even though brain regions involved in memory show increased tissue loss.
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.
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.
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.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.