One of the most common diseases is diabetes. Diabetes takes birth in someone's body when the insulin is destroyed. Doctors and scientists say that diabetes can also be caused by environmental factors or by genes. Overweight, obesity and an unhealthy body can push the insulin and can be a reason behind diabetes. Another reason behind this, the hormonal disease, release of certain hormones can cause insulin resistance and diabetes. There are many other reasons behind the destruction of insulin in the body like, medicine, damage of pancreas etc.