Diabetes is a complex group of diseases with a variety of causes. People with diabetes have high blood glucose, also called high blood sugar or hyperglycemia...Type 1 diabetes is caused by a lack of insulin due to the destruction of insulin-producing beta cells in the pancreas.Type 2 diabetes—the most common form of diabetes—is caused by a combination of factors, including insulin resistance, a condition in which the body’s muscle, fat, and liver cells do not use insulin effectively
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If insulin is not produced in ample amount it's type 1 diabetes

if Insulin is not used by our body den type 2 diabetes