Question

Why is insulin injection is used for such diabetes patients?

Answer 1

our pancreas secretes insulin when due to some disorder it secretes less insulin we say that the patient is having diabetes so to maintain the level they take extra insulin

Answer 2

Insulin is a hormone made in your pancreas, a gland located behind your stomach. It allows your body to use glucose for energy.Diabetes occurs when your body doesn't use insulin properly or doesn't make enough insulin.Injections of insulin act  as a replacement or supplement to your body’s insulin and can help to treat diabetes . that's why diabetes patients take  insuline injections