Caloric restriction improves health and survival of rhesus monkeys.
Level 5 - mechanism / opinion, no new human data
Animal research in non-human primates
PubMed 28094793 · doi:10.1038/ncomms14063
What was done
Researchers conducted a direct comparative analysis of longitudinal data from two landmark parallel studies on caloric restriction in rhesus monkeys: the University of Wisconsin study and the National Institute on Aging study. The analysis evaluated outcomes including survival, body weight, food intake, fasting glucose levels, and age-related morbidity alongside differences in study design such as diet and age of onset.
What was found
The abstract reports no numerical values, exact sample sizes, or effect sizes. It qualitatively reports that differences in study design, including diet composition and age at intervention onset, contributed to the conflicting survival outcomes between the two original studies, and concludes that caloric restriction confers conserved health and survival benefits in rhesus monkeys.
Why it matters
This harmonized analysis reconciles decades of conflicting data between the two largest primate longevity studies, reinforcing that caloric restriction can improve healthspan and survival in primates.
Limits
The abstract provides no numerical data or sample sizes. The study is conducted in non-human primates under captive conditions, which limits direct translation to free-living humans, and the original protocols differed markedly in baseline diet and onset timing.
Cited by
- supports In the University of Wisconsin calorie restriction study led by Rozalyn Anderson, rhesus monkeys lived longer and had significantly lower incidence of cancer and overall disease burden.