(At ScienceDaily). Genetically engineered mice that don't gain weight on a high-calorie diet appear to be immune to diabetes as well. This is yet another link between excess body fat and conditions like type II diabetes. There are a long list of studies that show obesity or even being overweight greatly increases the risk of suffering most conditions and diseases associated with aging: diabetes, Alzheimer's, cancer and so forth. This mouse study offers the possibility of treatments for humans, although that would be years away from this very fundamental research. Meanwhile, eat a sensible diet and watch your weight!