Hank explains the different types of fat (saturated, unsaturated, omega-3, trans) that exist and illustrates their molecular makeup. He uses a jar of peanut butter to relate his explanations to the real world.
Sophie explains why we eat food: to ingest chemicals such as nutrients. She dissects a salad to illustrate the different types of nutrients our body needs: carbohydrates, proteins, and fats. She provides an example of each type of nutrient.