 MSN published article  based on an interview with Dr Kraus.That calorie restriction (CR) might lengthen human lifespan was suggested by various studies on laboratory animals.However, when the studies were extended to long-lived primates (rhesus monkeys), while it was indeed found in a 2012 study by the US National Institute on Aging (NIA) that CR had benefits to immune function, motor coordination, and resistance to sarcopenia, a CR regimen implemented in rhesus monkeys of various ages did not improve survival outcomes.