An eating disorder refers to a type of mental disorder, which occurs due to abnormal eating behaviors affecting mental or physical health negatively. There are various types of eating disorders such as bulimia nervosa, avoidant/restrictive food intake disorder (ARFID), anorexia nervosa, pica, binge eating disorder, rumination syndrome and a group of other feeding or eating disorders. The treatment of eating disorders differs from disorder to disorder, and includes reducing excessive exercise, counseling, reduction of efforts to eliminate food, and dietary advice. Obesity is the state where excess body fat gets accumulated in the body, which results in negative impacts on human health. It is measured through body mass index (BMI) in which a person's weight is divided by the square of the person's height. It is a major cause of disability and also leads to various diseases and conditions like obstructive sleep apnea, osteoarthritis, cardiovascular diseases, certain types of cancer and type 2 diabetes. The readers would gain knowledge that would broaden their perspective about eating disorders and obesity through this book. It unravels the recent studies on these disorders. This book will prove to be immensely beneficial to students and researchers in this field of study.