The medical condition in which excess fat accumulates on the body parts, causing several negative impacts upon one’s health, is called obesity. A person is considered to be obese when his body mass index exceeds 30 kg/m2. Obesity increases the risk of developing cardiovascular diseases, osteoarthritis, Type-2 diabetes, hypertension, fatty liver disease, depression and obstructive sleep apnea, among others. It is caused by lack of physical activity, the habit of overeating and genetic susceptibility. Diet modification and regular exercise are the most common and effective ways of treating obesity. Other treatment methods include anti-obesity medications, gastric balloon and bariatric surgery. This book provides significant information about obesity to help develop a good understanding of this medical condition. It aims to shed light on some of the unexplored aspects of obesity and various treatment methods associated with it. The extensive content of this book provides the readers with a thorough understanding of the subject.