With nearly 10% of the world’s population affected, type 2 diabetes is a major public health issue. An excessively sedentary lifestyle and excessively caloric diet encourage the development of this metabolic disease by altering the functioning of pancreatic cells and making blood sugar regulation less effective. However, fat, which is often cited as the ideal culprit, could be rehabilitated. Indeed, fat does not necessarily aggravate the disease and could even play a protective role.