Why fat is essential in the body?
Fats are a vital part of the membrane that surrounds each cell of the body. Cell membrane is essential.
Fat is a component of myelin, the fatty insulating sheath that surrounds each nerve fiber, enabling it to carry messages faster, a part of brain or nervous system.
Vitamins A, D, E, and K are fat-soluble vitamins and the fat in foods only helps the intestines absorb these vitamins into the body.
Fats make hormones. Fats are structural components of some of the most important substances in the body, including prostaglandins, hormone-like substances that regulate many of the body's functions. Fats regulate the production of sex hormones.
Fat provides healthier skin. One of the more obvious signs of fatty acid deficiency is dry, flaky skin. In addition to giving skin its rounded appeal, the layer of fat just beneath the skin (called subcutaneous fat) acts as the body's own insulation to help regulate body temperature.
Fat forms a protective cushion for your organs. Many of the vital organs, especially the kidneys, heart, and intestines are cushioned by fat that helps protect them from injury and hold them in place. The importance of this protective layer is taken into account by the body, and this protective fat is the last to be used up when the body's energy reserves are being tapped into.
Sources:
http://www.ricela.com/fat_human_health.html
http://www.askdrsears.com/topics/family-nutrition/facts-about-fats/why-you-need-fats
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