The Elements of Life Macronutrients: The Energy Nutrients Carbohydrates Lipids Proteins Micronutrients: The Catalysts Vitamins Minerals Water: The Most Important Nutrient Bioavailability of Nutrients Nutrient Digestion Nutrient Absorption Cellular Metabolism Body Energy Components of Cells Energy Utilization Catabolic Pathways Anabolic Pathways Nucleic Acids, Genes, and Protein Synthesis Metabolic Aspects Free Radicals, Lipid Peroxidation, and the Antioxidants Digestive and Metabolic Interactions between Medications and Nutrients/Foods Nutrient Metabolism and Dietary Recommendations Appendices Basic Concepts in Chemistry and Biology Photosynthesis References.