the researchers in the latest research fed one group of men a diet in consisting 60 days of cholesterol came from fat . the nutrition restarted when the mouse , all males , were 1 year adult , which is middle - age in mouse longevity . as expected , the mice soon experienced signs of anticipated diabetes , with grossly enlarged kidney , and started to die much sooner than mice met a standard digest .
At the age of one year, male mice were fed with a diet in which 60 percent of calories came from fat.