Food is the source of energy that keeps you going. Every mouthful of food is like a tiny battery pack. In addition to energy food supplies the building blocks such as proteins and nutrients that your body uses to repair itself. Cooks know how to make food taste good and look mouthwatering. A snail may not be your idea of a tasty snack but it is a real treat for some people. Everyone needs food to survive no matter what form it comes in. But which foods are best for you You can find out by reading about nutrition the science of food.