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What is Diabetes? inShare By Dr Ananya Mandal, MD

Diabetes is a condition where the body fails to utilize the ingested glucose properly. This could be due to lack of the hormone insulin or because the insulin that is available is not working effectively.

Diabetes mellitus
The term diabetes is the shortened version of the full name diabetes mellitus. Diabetes mellitus is derived from:

the Greek word diabetes meaning siphon - to pass through the Latin word mellitus meaning honeyed or sweet
This is because in diabetes excess sugar is found in blood as well as the urine. It was known in the 17th century as the “pissing evil”.

Diabetes epidemiology
Diabetes is the fastest growing long term disease that affects millions of people worldwide. According to the charity Diabetes UK, more than two million people in the UK have the condition and up to 750,000 more are unaware of having the condition.

In the United States 25.8 million people or 8.3% of the population have diabetes. Of these, 7.0 million have undiagnosed diabetes. In 2010, about 1.9 million new cases of diabetes were diagnosed in population over 20 years. It is said that if this trend continues, 1 in 3 Americans would be diabetic by 2050.

Types of diabetes
There are two types of diabetes – Type 1 and type 2. Type 1 diabetes is called insulin-dependent diabetes mellitus and occurs at a younger age or childhood. In these patients there is complete lack of the hormone insulin that mandates external administration of the hormone regularly as treatment.

Around 75% of people with diabetes have type 2 diabetes mellitus. This was earlier termed non-insulin dependent diabetes mellitus (NIDDM) or maturity-onset diabetes mellitus. The number of people with type 2 diabetes is rapidly increasing. In type 2 diabetes, not enough insulin is produced or the insulin that is made by the body is insufficient to meet the needs of the body. Obesity or being overweight predisposes to type 2 diabetes.

Gestational diabetes
Gestational diabetes occurs in pregnant women who have never had diabetes before but who have high blood sugar levels during pregnancy. Gestational diabetes affects about 4% of all pregnant women. After childbirth the mother may go on to develop type 2 diabetes.

How is blood sugar regulated normally?
When food is taken, it is broken down to smaller components. Sugars and carbohydrates are thus broken down into glucose for the body to utilize them as energy source. The liver is also able to manufacture glucose.

In normal persons the hormone insulin, which is made by the beta cells of the pancreas, regulates how much glucose is in the blood. When there is excess glucose in the blood, insulin stimulates cells to absorb enough glucose from the blood for the energy that they need. Insulin also stimulates the liver to absorb and store any glucose that is excess in blood. Insulin release is triggered after a meal when there is rise in blood glucose. When blood glucose levels fall, during exercise for example, insulin levels