Blood sugar: Learn about normal blood sugar levels

Learn about normal blood sugar levels, risks of high and low glucose, symptoms, and when to seek medical attention for better health. Blood sugar, also known as blood glucose, is a simple sugar that your body uses for energy . Insulin and glucagon are two hormones that help regulate blood sugar levels in your body. Too much or too little blood glucose can cause immediate symptoms and chronic health problems. Learn about the target blood sugar ranges for people with type 1 or type 2 diabetes, and the symptoms and risks of high or low blood sugar levels. Find out how to manage your blood glucose with diet, exercise, and medication. High or low blood sugar can lead to complications, but these conditions are treatable. Learn what constitutes normal blood sugar and how it's tested.