Some people do not produce enough insulin. When they eat food, the glucose levels in their blood cannot be reduced. This condition is known as Diabetes. Diabetics sometimes have to inject insulin into their blood. They have to be careful of their diet. Diabetes is a lifelong condition that causes a person’s blood sugar level to become too high. There are two main types of diabetes – type 1 diabetes and type 2 diabetes. Type 2 diabetes is far more common than type 1. In the UK, around 90% of all adults with diabetes have type 2.