A nutrient is a substance that your body needs for energy and growth. These nutrients are important. One type of nutrient is carbohydrates. Carbohydrates are nutrients used by the body as its main source of energy. Carbohydrates are in foods that contain sugar, such as fruits.
Carbohydrates are also in foods such as breads, cereals, and pasta.
Some foods have fats in them. Fats are substances that are used by the body as long-lasting sources of energy. Eating too many fats can add unhealthful weight to your body, but that doesn't mean that fats are bad. You don't need a lot of fat each day, but you do need some. Nuts, meats, and oils are foods that contain fats.