The National Institute on Aging in the United States has been raising 121 macaques more than 20 years ago and conducting research and analysis. Because macaques are physiologically close to humans and have a long life span, scientists prefer to use them for long-term follow-up studies.
The researchers divided the macaques into two groups, allowing one group to reduce their caloric intake by 30% per day. After limiting calories for more than 20 years, it was found that regardless of the gender of the macaques, no matter how many years they started to limit calorie intake, there was no statistically significant difference in mortality between the two groups of macaques.
However, the study also showed that although limiting calorie intake does not make macaques live longer, it is still good for health. Limiting calorie intake reduces their body weight, lower levels of cholesterol and triglycerides, and a tendency to delay the onset of cancer, diabetes and arthritis.
Related papers have been published in the new issue of Nature.