Why do we need to eat and how does food give us energy? Why do you have to eat vegetables? Why does junk food taste so good? So many questions about food and nutrition. We get answers from Wesley Delbridge, of the American Academy of Nutrition and Dietetics. Other questions in this episode include: Why does eating salty food make you thirsty? Why is sugar bad for you? Why are vitamins in food? Why is breakfast so important? Why do children get hungry at night? Why is fast food so popular?