Diabetes is one of the most common diseases which are suffered by the people all over the world. Though this disease is expressed in only one word it has got far reaching effects. If a person falls in the vicious circle of diabetes then he/she will have to bear with it for his/her whole life. It is so because diabetes is a chronic disease and thus it cannot be cured and can only be controlled. Diabetes basically affects the energy producing function of the body. Thus glucose, which is the energy provider, starts settling in the bloodstream. This leads to various complications and consequently diabetes. Diabetes basically pertains to blood glucose levels. Blood glucose levels refer to the amount of glucose or sugar present in the blood. The measurement of blood glucose levels is done in millimeters per liter. Normally, the blood glucose levels throughout the day, remains somewhere near 4-8 millimeters per liter. Thus in case of diabetes the blood glucose levels cross this limit and thus it affects the person. Now it is also important to control the blood glucose levels because if the blood glucose level increases then it is harmful for small blood vessels. Thus maintaining the blood glucose levels is a must for a diabetes patient.