Obesity is a medical condition in which the body gains an excessive amount of fat. It is a complex disease that is associated with other health complications, such as heart disease, diabetes, high blood pressure and certain cancers. Diabetes is a metabolic health condition that affects the mechanism through which the body uses blood sugar. Obesity can affect the mechanism of the body with which it uses insulin to manage blood sugar levels. This leads to an increased risk of insulin resistance and diabetes. The diagnosis of obesity involves skinfold thickness tests, waist-to-hip comparisons, and screening tests such as ultrasounds, CT scans and MRI scans. Blood tests which examine cholesterol and glucose levels, liver function tests, diabetes screening, thyroid tests, and heart tests are performed to diagnose health risks linked with diabetes. Treatment for obesity may include weight loss medications, eating and exercise plans, whereas insulin injections, carbohydrate counting, and frequent blood sugar checks help in the management of diabetes. This book outlines the diagnosis and management of obesity and diabetes in detail. It is a vital tool for all researching and studying these medical conditions.