Diabetes
Diabetes mellitus is a nutritional disorder, characterized by an abnormally elevated level of blood glucose and by the excretion of the excess glucose in the urine. It results from an absolute or relative lack of insulin which leads to abnormalities in carbohydrate metabolism as well as in the metabolism of protein and fat.

Diabetes is a disease known to the medical world since time immemorial. Its incidence is much higher at present than ever in the past. This is especially true in the case of more advanced countries of the world due to widespread affluence and more generous food supply.

The most commonly-used screening tests are the determination of the fasting blood glucose level and the two-hour postprandial that is after a meal. The normal fasting blood sugar content is 80 to 120 mg. per 100 ml. of blood and this can go up to a level of 180 mg. per 100 ml. of blood two hours after meals. 

Anything above these norms can be termed diabetic levels. Diabetes occurs in all age groups, from young infants to the elderly. The greatest incidence occurs in middle or older aged persons. It is estimated that 80% - 85% of all individuals with diabetes mellitus are 45 years of age or older.

Symptoms
The word diabetes is derived from the Greek word meaning "to siphon to pass through", and mellitus comes from the Latin word "honey". Thus, two characteristic symptoms, namely, copious urination and glucose in the urine give the name to the disease. The normal volume of urine passed daily is about 1.5 liters. The urine is of a pale color, has an acidic reaction and sweetish odor. The quantity of sugar present in it varies from one-and-quarter decigram to 2.5 grams the total per day in many cases reaching as much as one kg in 15 liters of urine.

A diabetic feels hungry and thirsty most of the time, does not put on weight, though eats every now and then, and gets tired easily, both physically and mentally. The person looks pale, may suffer from anemia, constipation, intense itching around the genital organs, palpitations and general weakness. They  may feel drowsy and has a lower sex urge than a normal person.

Causes
Diabetes has been described by most biological doctors as a "prosperity" disease, primarily caused by systematic overeating and consequent obesity. Not only the overeating of sugar and refined carbohydrate but also of proteins and fats, which are transformed into sugar if taken in excess, is harmful and may result in diabetes. Too much food taxes the pancreas and eventually paralyses its normal activity. It has been estimated that the incidence of diabetes is four times higher in people with moderate obesity and 30 times higher in people with severe obesity.

Grief, worry, and anxiety also have a deep influence on the metabolism and may cause sugar to appear in the urine. The disease may be associated with some other grave organic disorders like cancer, tuberculosis, and cerebral disease. Heredity is also a major factor in the development of the disease. It has been rightly said, "Heredity is like a cannon and obesity pulls the trigger."

Treatment