The science of interpreting the interaction of nutrients and other substances in food with respect to various processes needed to sustain life in organisms is known as nutrition. Some of the processes which are studied within this discipline in relation to food are health, maintenance, reproduction, growth and disease of an organism. The set of chemical reactions which are essential for the sustenance of life is known as metabolism. There are three major purposes of metabolism. The first purpose is the elimination of nitrogenous wastes. The second one is the conversion of food to energy for running cellular processes. The third purpose of metabolism is the conversion of food to building blocks for proteins, lipids, nucleic acids, etc. This book provides comprehensive insights into the fields of nutrition and metabolism. It consists of contributions made by international experts. Coherent flow of topics, student-friendly language and extensive use of examples make this book an invaluable source of knowledge.