Broad question: Thats a broad question. Type 1 diabetes is an autoimmune disease. It is only 30% genetic. Type 2 diabetes is 80% genetic. It starts off with insulin resistance. The body just makes more insulin initially but eventually it cant keep up and the blood sugars start to rise. With a genetic predisposition if one eats processed sugars, becomes overweight and does not exercise type 2 diabetes may set in.
Answered 1/26/2015
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