Having constantly raised blood glucose levels damages your blood vessels and nerves, leading to problems affecting your kidneys, feet and eyes. Your risk of stroke and heart attacks also increases. Insulin therapy helps prevent diabetes complications by keeping your blood glucose within your target range. Because insulin helps to move the glucose from your blood into your cells, you may also feel better and have more energy once you start on insulin. Taking insulin may mean you can stop taking, or reduce the dose of some of your tablets.
Delaying starting insulin can result higher blood glucose, increasing the risk of developing or worsening diabetes-related complications.