Mice are eating the same number of calories but they're also fasting for 12 to 14 hours every day. These mice not only lived longer they were also healthier because there was delayed incidence of cancer and other stuff. If you reduce calorie and align it to the right time on time then you can even extend the benefit for benefit of reduced calorie so this is with reduced calorie. In many ketogenic diet study in mice I'm not sure whether in these papers read carefully you have to give the ketogenic diet left left it in the case or they were carefully giving the Ketogenic diet every day.