Understanding the way in which nutrients are metabolised, and hence the principles of biochemistry, is essential for understanding the scientific basis of what we would call a healthy diet. Extensively revised and updated to reflect current knowledge of nutritional and dietary requirements, Introduction to Nutrition and Metabolism, Fifth Edition presents an accessible text on the basic principles of nutrition and metabolism and the biochemistry needed for comprehending the science of nutrition. This full-color text explores the need for food and the uses to which that food is put in the body, as well as the interactions between health and diet. It describes the metabolic pathways and the biochemical basis of their nutritional and physiological importance. Topics covered include chemical reactions and catalysis by enzymes; the role of ATP; digestion and absorption of carbohydrates, fats, and proteins; issues associated with being overweight; problems of malnutrition; and vitamin and mineral requirements and functions.