The branch of medicine focused on the functioning of the digestive system and the diverse disorders related to it is called gastroenterology. All diseases related to the internal organs from mouth to anus, along the alimentary canal are studied under gastroenterology. Hepatology is a sub-field of gastroenterology. It is concerned with the study of organs like, liver, gallbladder, pancreas and bile ducts. Hepatitis and fatty liver disease are two of the most common liver diseases. The inflammation of the liver tissue is called hepatitis, whereas, fatty liver disease is the condition where excess fat builds up in the liver. Different approaches, evaluations, methodologies and advanced studies on clinical gastroenterology and hepatology have been included in this book. It presents researches and studies performed by experts across the globe. This book is appropriate for students seeking detailed information in this area as well as for doctors and experts.