the researchers in the latest study fed another group of pigs a diet in which 60 grams of sodium coming from fat . the diet originated whenever the subjects , all males , were 1 year old , which is medium - age in mouse longevity . as expected , the mice soon developed signs of impending starvation , with grossly oversized transplanted , and happened to life much sooner than mice fed a traditional food .
At the age of one year, male mice were fed with a diet in which 60 percent of calories came from fat.