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Fat is an essential part of your diet. It provides energy, absorbs certain nutrients and maintains your core body temperature. You need to consume fat every day to support these functions, but some types of fat are better for you than others.
Carefully planned nutrition must provide an energy balance and a nutrient balance. The nutrients are: 1  Proteins-essential to growth and repair of muscle and other body tissues. 2  Fats-one source of energy and important in relation to fat soluble vitamins.3  Carbohydrates-our main source of energy.arefully planned nutrition must provide an energy balance and a nutrient balance. The nutrients are: 1  Proteins-essential to growth and repair of muscle and other body tissues. 2  Fats-one source of energy and important in relation to fat soluble vitamins. 3  Carbohydrates-our main source of energy.