Expanded and updated, this new edition continues in the tradition of its predecessor, serving as an essential textbook for advanced undergraduate and first-year graduate students studying human nutrition. The book incorporates fundamental concepts in nutrition science and provides comprehensive coverage of both macro and micronutrients, emphasizing each nutrient’s description, absorption, use, and excretion. Highlighted topics include exercise, obesity, starvation, trauma, nutrigenomics and nutrient-gene interactions, the effects of aging, and nutrition requirement comparisons among different species. The book includes chapter summaries, case studies, problem-solving activities, and critical thinking questions.