Glucose - Blood Sugar (Diabetes)

Glucose is a type of sugar found in fruits and many other foods. It is the main source of energy used by the body. Most of the carbohydrates that people eat are turned into glucose, which can be used for energy or stored in the liver and kidneys as glycogen.

A hormone called insulin helps the body use and control the amount of glucose in the blood. Insulin is produced in the pancreas and released into the blood when the amount of glucose in the blood rises. People who do not produce enough insulin develop diabetes. People can also develop diabetes if they do not respond normally to the insulin their bodies produce. This occurs most commonly when a person is overweight.

Normally, blood glucose levels increase slightly after a person eats a meal. This increase causes the pancreas to release insulin so that blood glucose levels do not get too high. Blood glucose levels that remain high over time can cause damage to the eyes, kidneys, nerves, and blood vessels.