Diabetes is a chronic and potentially fatal disease which affects your whole body. Billions of people have diabetes, and the worrying fact is that a high percentage of affected patient are not even aware that they are diabetic.If you have diabetes or pre diabetes, your doctor will likely recommend that you see a dietitian to help you develop a healthy eating plan. The plan helps you control your blood sugar (glucose), manage your weight and control heart disease risk factors, such as high blood pressure and high blood fats.