Disclosed is a method and composition for nutritionally improving glucose and insulin balance in an individual. The invention further provides a method for treating a comorbidity of diabetes. In one embodiment, the invention provides a nutritional formulation comprising: a protein source； a fat source； and a carbohydrate source, wherein the protein source, the fat source, and the carbohydrate source are in a ratio of about 1:1:1, each comprising about one third of the total calories of the composition.
