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Fat is one of the three main classes of nutrients that provide energy to the body. Fat can produce about 4,000 calories of energy per pound (9 calories per gram). Fat has many important uses. It is a concentrated source of food energy found in animals and plants. Saturated fats found in animals are solid in room temperature and unsaturated fats mostly found in plants are liquid in room temperature. Most fat from animal sources contains a large proportion of saturated fats and is said to be highly saturated. Animal fats are most likely to be found in most American diets where we will more than likely find high cholesterol, heart diseases and obesity.
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