the researchers in the second studied added 1 study of mice a food in which 60 percent of calories came from fat . the study started when the mice , all males , were 1 year younger , therefore is high - age in human immortality . as expecting , the mice subsequently developed signs of infant diabetes , with irresponsible enlarged transplant , and started to died somewhat less than mice fed a standard diet .
At the age of one year, male mice were fed with a diet in which 60 percent of calories came from fat.