There are no outward physical signs of insulin resistance. A blood test for glucose and insulin are measured can help determine if someone is insulin resistant. Many people who are insulin resistant produce large enough quantities of insulin to maintain near normal blood glucose levels. No one knows for sure. Some scientists think a defect in specific genes may cause insulin resistance and type 2 diabetes.
Researchers continue to investigate the cause.
Science has not yet determined why some people with insulin resistance eventually develop diabetes and others do not. By maintaining an appropriate weight and a physically active lifestyle many individuals are able to reduce their chances of becoming insulin resistant and developing diabetes. Lower insulin levels will help stop the progression of abnormal cholesterol levels, elevated blood pressure, obesity, and the development of diabetes hence lowering the risk of developing cardiac disease. Carbohydrates differ in how fast they are broken down into glucose particles depending on how refined they are and how much natural fiber remains in them. Simple, highly refined carbohydrates such as white sugar, white flour, white rice, and juices are broken down quickly, rising your blood sugar fast and high with a corresponding high release of insulin.