The three macronutrients of protein, fat, and carbohydrates all perform essential roles in the human body. Macronutrients are the main components of our diet. Our bodies require others nutrients as well, such as vitamins and minerals. However, these are needed in much smaller quantities, and thus are referred to as micronutrients. All three macronutrients are needed in the diet, as each perform vital functions in the body.
What is a Macro?
Proteins crucial role in the body includes building, maintaining and repairing body tissue. It is especially important to physically active individuals whose muscle tissue is constantly in need of repair. Protein has other roles in the body. All enzymes and hormones, which perform vital functions, are proteins. In addition, proteins are used to aid in the immune process.
Protein
Fat has many roles in the human body. One of fats main functions is protection. This includes insulation to keep body temperature and cushioning to protect body organs. It also promotes growth and development, as well as maintaining cell membranes. Fat, in addition, plays a vital role in the digestion of vitamins. Vitamins A, D, E, and K are fat soluble vitamins, meaning they need fat in order to be absorbed into the body.
Fat
Carbohydrates are the main energy source of the body. They are chains of small, simple sugars that are broken down and enter the body as glucose. Glucose is essential for the body, as it is the preferred source of energy in our brain, heart and central nervous system. For this reason, your diet should consist of at least 45 to 65 percent carbohydrates.