About 830 million people worldwide have diabetes, according to the World Health Organization (WHO), and the numbers are climbing. This chronic metabolic disease, caused by elevated levels of blood glucose (or blood sugar), can lead to serious damage to the heart, blood vessels, eyes, kidneys, and nerves, over time, and hence keeping blood sugar levels in check is crucial. As there are different types of diabetes, and there is no one-size-fits-all solution to control it, making certain lifestyle changes can certainly help. Here are 5 effective ways to improve your blood sugar levels and manage diabetes.