That's So Raven: Food for Thought
Chelsea tells Raven that the food they got from the food court is unhealthy and is having a negative impact on their health. Raven acts as if everything is fine even though she is tired from simply standing up from the ground. Raven has a vision of the future, and in it, she and everyone in the school has gained a lot of weight. That inspires Raven to change her eating habits.