Diabetes is a metabolic disorder that is caused when pancreas stop producing enough insulin or the cells of the body are not able to respond properly to the insulin produced. It is categorized by the condition of high blood sugar over a long period of time. Type 1diabetes, type 2 diabetes, and gestational diabetes are the three main types of diabetes. Type 1 diabetes occurs when the pancreas fails to produce enough insulin. Type 2 diabetes occurs when the cells fail to respond to insulin properly. Gestational diabetes occurs when pregnant women develop high blood sugar levels without having a previous history of diabetes. Frequent urination, increased thirst, and increased hunger are some symptoms of diabetes. Diabetes can cause many complications such as diabetic ketoacidosis, cardiovascular disease, strokes, chronic kidney disease, etc. Diabetes can be treated and prevented by maintaining a healthy diet, medications, physical exercise and control of blood pressure, etc. This book unravels the recent studies in this field. It presents researches and studies performed by experts across the globe. The extensive content of this book provides the readers with a thorough understanding of the subject.