What causes diabetes? Diabetes (diabetes mellitus) is a type of metabolism disorder. Metabolism is defined as the process by which our bodies use digested food in order to develop energy and to promote growth. What people eat gets broken down into glucose which is a type of sugar found in the blood. Glucose is people's primary source of fuel.

Glucose in blood gives people the energy to perform their everyday activities –walk around the block, run a mile, ride a bike, take a dance class, or ordinary chores such as taking the garbage out. From the foods you take in, the glucose in your blood is produced by your liver.
In a normal, healthy person, the glucose level in the blood is regulated by different kinds of hormones, such as insulin. The pancreas produces insulin and other enzymes to help in digestion. Insulin will allow glucose to travel from the blood into your liver, muscles, and fat cells where it is used up for body fuel.
People diagnosed with diabetes will either not have the capacity to produce enough insulin (Type 1 diabetes), their bodies cannot use the insulin properly (Type 2 diabetes) or, even both. In diabetes, the glucose in the blood cannot reach the cells so it just remains in the blood. This endangers the cells, which are in need of glucose for their energy. Other tissues and organs are also harmed due to high glucose levels.
Sugar as the main trigger of diabetes is probably the biggest misconception about the disease. It is true that if you have the disease you will need to closely monitor your carbohydrate and sugar intake to effectively manage your sugar levels. However, if you are not suffering from diabetes, consuming sugar will not cause you to develop the disease.
So does it mean you can eat as much dessert as you please? No. Although sugar does not directly cause diabetes, too many calories do. Keep in mind, a diet that is high in calories is one of the main risk factors for diabetes (type 2). Excessive caloric intake typically results in obesity
So, what causes diabetes? The following are the major causes of diabetes: