Jamun fruit is a summer fruit packed with a plenty of medicinal benefits in it. To keep your blood sugar levels, you can drink jamun fruit juice twice a day. It is very important to maintain your blood sugar levels to stay healthy and to prevent diabetics. If you have diabetes, your blood glucose levels will be too high. And also, diabetes can damage the heart, brain and kidneys, etc..To avoid such conditions, the diabetic patients can drink jamun juice that controls blood sugar levels and diabetes.