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   ocr: BALANCED DIET is one that is right for a a particular organism. That means it must have the right amounts oft the right nutrients. An organism might need different combinations of food at different times ofits life- for example, it might need more protein during periods of rapid growth. CARBOHYDRATES, PROTEINS, ANDFATS Human beings need carbohydrates, proteins, and fats in comparatively large quantities. Carbohydrates include starch and sugars; starch is found in potatoes and bread, for example, and sugars are found in fruit. Carbohydrates supply energy. Proteins are found in meat, fish, eggs, ...