There is a high correlation between weight gain and the propensity for type 2 diabetes.
On the other hand, a loss of weight could be an indicator that you have developed diabetes. Rapid and sizeable weight loss ( 5 to 10 kg), in a short period of time, without conscious dieting may indicate type 2 diabetes. Diabetes inhibits the ability of the body to metabolize glucose therefore, the body gets nourishment by using stored fat and protein from muscles. This along with frequent urination leads to this weight loss. Calories are lost as excess glucose is released in the urine.