Focuses on the basic anatomy, physiology, and chemistry of nutrition. Topics include weight management, the role of diet and lifestyle in disease prevention, specific nutrient deficiencies and toxicities, nutrition standards and guidelines, sports nutrition recommendations, agricultural practices, and food policy issues. IPHY juniors or seniors are excluded from taking this course. Credit not granted for both IPHY 2420 and 3420. Approved for arts and sciences core curriculum: natural science. Prerequisites: Restricted to non-IPHY majors or IPHY freshmen/sophomores only.