It may have surprised you to read at the beginning of this chapter that fat is considered one of the three macronutrients we need for good health. But its true. Fat is a vital nutrient just as vitamin C and iron are vital nutrients. In fact, healthy production of your cell membranes depends on your continued consumption of fats.

Furthermore, fats are needed to create compounds called eicosanoids, which are similar to hormones. Your body requires these eicosanoids for the proper regulation of blood pressure, heart rate, blood vessel constriction and blood clotting. Eicosanoids also ensure normal functioning of the nervous system and vital organs, and work with proteins to keep your hair and skin healthy.