Diabetes is a group of diseases marked by high blood glucose levels resulting from the body's inability to use or produce insulin.
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Type 1 diabetes (diagnosed in children and young adults)
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Type 2 diabetes (the most common type of diabetes, usually diagnosed in adults)
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Gestational diabetes (occurs during pregnancy)
Prediabetes is a condition in which blood sugar is high, but not high enough to be considered type 2 diabetes.