Bananas makes a trip to the doctor when he has a stomachache. She tells him that he needs to eat a variety of foods, instead of just bananas. You need to eat from all of the food groups, so you can get all the necessary nutrients.
A visit to Dr. Grizzly's office in the midst of their preparation for the race shows Brother, Sister, and Papa that they should pay more attention to what kind of food they are putting into their bodies.
Sophie discusses the types of nutrients found in junk food then lists out the different types of fat that exist in food: unsaturated, saturated, and trans.