Role of Intermittent Fasting in the Management of Prediabetes and Type 2 Diabetes Mellitus

Diabetes mellitus (DM) is a highly prevalent disease in the modem society. It can be defined as a group of metabolic diseases marked by chronic hyperglycemia arising from defects in insulin secretion or resistance to insulin action, or both. Its predecessor, prediabetes, is also an important entity, and its management is essential to prevent its progression to DM. Together, these entities burden global health and the world economy, and therefore, prevention and management are key to improving global health and reducing the financial burden on the world economy. Comprehensive lifestyle modification has been proven to be a safe and effective method for preventing the progression of prediabetes and treatment of type 2 diabetes mellitus. Lifestyle modifications such as weight loss, exercise, and diets such as low-carbohydrate one, Mediterranean, and very low calorie diets are traditionally recommended. These particular diets aim to attain calorie deficits and thus induce weight loss. Intermittent fasting (IF) is one such diet that focuses more on the timing of calorie consumption. However, there are several methods of achieving this, which are highlighted in this review. IF has been shown to promote weight loss, reduce insulin resistance, improve glycemic control and lower the risk of cardiometabolic diseases. However, little literature is available regarding the use of IF in managing DM. This review intends to elucidate the role of intermittent fasting in preventing and treating DM, including its benefits and limitations. From the various studies reviewed in this article, it can be deduced that intermittent fasting can achieve suitable glycemic targets and weight control.