Fat is an essential nutrient that must be ingested in certain amounts in order for certain bodily functions to occur. People who do not eat enough fat could potentially suffer from poor vitamin absorption, depression, and an increased risk for high blood pressure and cholesterol, according to SparkPeople.
According to the Harvard School of Public Health, fats are responsible for providing energy, as well as providing a place for energy to be stored. Without fat, the body would be unable to absorb certain fat-soluble vitamins, such as vitamin E. Fat is critical in the manufacturing of vitamin D. Fats are responsible for creating and balancing hormonal levels, thus affecting moods.
The Harvard School of Public Health identifies three types of fats: unsaturated, saturated and trans fats. Unsaturated fats, both monounsaturated and polyunsaturated, are healthy fats that help to govern many functions in the body. These fats keep the amounts of harmful LDL cholesterol low, thus improving total cholesterol. Saturated fats are harmful fats that come from animal and dairy products. Trans fats are found in processed foods. A healthy diet is rich in unsaturated fats, such as those found in fish, nuts and seeds. Saturated fats and trans fats should be moderated closely.