Diabetes is a chronic disease caused by the body's failure to produce enough insulin to regulate blood glucose -- or blood sugar.
Raised blood glucose can eventually damage the heart, blood vessels, eyes, kidneys and nerves. Abnormally low blood glucose can cause seizures and loss of consciousness.
Type 1 diabetes is not currently preventable and sufferers require daily administration of insulin to survive.
Type 2 diabetes -- which results from the body's ineffective use of insulin -- is far more common and can be influenced by lifestyle as well as genetic and metabolic factors.
Impaired glucose tolerance (IGT) and impaired fasting glycemia (IFG) are elevated glucose levels not yet at the level of diabetes but which nonetheless increase the risk of heart attacks and strokes.
Additionally, pregnant woman can develop gestational diabetes, increasing the risk of complications and the long-term risk of type 2 diabetes.
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