Since years, many studies have been done on rats and rhesus monkeys, which have given hope that calorie restriction helps in adding more years to life. Though the study findings were not 100% sure, people started adopting calorie restriction phenomenon to such an extent that they started cutting food intake by 30%.

However, a new study has cancelled all such claims and has affirmed that calorie restriction might help in improving health, but does not add more years to life. The study, which has been published in the journal Nature, has revealed that the previous study findings might not extend to humans.

"One thing that's becoming clear is that calorie restriction is not a Holy Grail for extending the life span of everything that walks on earth”, said Rafael de Cabo, who has been working as an experimental gerontologist at the National Institute on Aging, US.

In order to prove his hypothesis, he used two sets of monkeys of different age groups and controlled their diet intake. In order to compare the result of calorie restriction, he also included control groups, which included two sets of monkeys, which were given normal food. No change in the age of two groups was being noticed.