Food consists of three major macronutrients: carbohydrates, protein, and fat. Fat contains more energy than either protein or carbohydrates. Fat is essential for forming cell membranes and for hormone production. Inadequate fat intake can lead to vitamin deficiency, since fat acts as a carrier for fat-soluble vitamins, including Vitamins A, D, E, and K. Fat is found in both animal and vegetable products, adds flavor to food, and satisfies hunger as well.
Read more: Should I Eat a Low-Fat Diet?