If your teenager can empty a refrigerator faster than you can restock it, you are not imagining the financial impact. A teenager grocery bill can rival what many households spend feeding an adult, especially when sports, growth spurts, snacks, and convenience foods enter the picture. Current food-plan estimates suggest feeding one teen at home can easily cost several hundred dollars each month. Understanding where that money goes can help parents budget realistically without turning every trip to the kitchen into a family argument.