The branch of science which interprets the interaction of nutrients present in food with respect to maintenance, health, disease and growth of organisms is known as nutrition. It studies various biological processes such as absorption, assimilation, biosynthesis and excretion. Some of the different nutrients studied under this field are carbohydrates, fats, proteins, vitamins and minerals. Diet therapy is a domain of dietetics which is concerned with the usage of foods for therapeutic purposes. It generally involves the alteration of the dietary lifestyle of a person in order to promote optimum health. Some of the therapies which fall under diet therapy are full liquid diet, clear liquid diet, pureed diet, renal diet and high fiber diet. This book provides comprehensive insights into the field of nutrition and diet therapy. It strives to provide a fair idea about this discipline and to help develop a better understanding of the latest advances within this field. Scientists and students actively engaged in this field will find this book full of crucial and unexplored concepts.