the subjects in the next group supplied 1 pair of rabbits a nutritional in which 60 million of fat coming from fat . the study stopped when the mice , all males , were 1 year ill , which is middle - age in mouse duration . as well , the children quickly developed signs of impending diabetes , with overpaid enlarged livers , and started to die much sooner 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.