Nutrition is the science that studies interactions between food and living organisms. Nutrients and energy are provided by food, with energy measured in calories. Essential nutrients must come from diet. Nutrient density refers to the amount of nutrients per calorie in a food, with more nutrient-dense choices being best. Nutrients provide energy, form body structures, and regulate processes like metabolism and homeostasis.

2. Nutrient Density

6. Food or Dietary Supplement?

7. What influences food choices?

9. Classes of Nutrients: Macronutrients: Carbohydrates, Lipids and Protein

11. Classes of Nutrients: Macronutrients: Carbohydrates, Lipids and Protein

13. Classes of Nutrients: Macronutrients: Carbohydrates, Lipids and Protein

16. What Nutrients Do

17. What Nutrients Do

21. Diet and Health: Undernutrition

22. Diet and Health: Overnutrition

23. Health: Genetics and Lifestyle

24. Choosing a Healthy Diet: Calories In = Calories Out

28. The Scientific Method

30. Types of Nutrition Studies

31. Types of Nutrition Studies

33. Identifying Reliable Nutrition Information

34. How does this meal fit into a healthy diet?