Diabetes is a metabolism disorder. Food gets broken down into glucose and this glucose gets absorbed by the blood. The cells utilize glucose for growth and energy. If you are diabetic, the amount of glucose in your blood will be high. In type 1 diabetes, the body destroys the insulin producing cells in the pancreas. If you have type 1, then you need to take insulin to keep your body going. This doesn't depend on your life style. In type 2 diabetes one will experience lesser production of insulin or the insulin may not work properly. This happens when you are overweight and unfit. This type happens later on in life.