1. Due to insufficiency, of insulin level there is prolonged hyperglycemia. This leads to diabetes mellitus.
2. In this diabetic condition cells are unable to utilize glucose. Therefore, in a diabetic person blood glucose levels are high. The glucose is excreted in urine.
3. The harmful compounds like ketone bodies are formed leading to ketosis.
4. Diabetes can be treated by taking insulin injections or tablets (insulin therapy) or with hypoglycemic drugs.