Carbohydrates, proteins, and fats are the three macronutrients that provide the body with energy and building blocks for growth and repair.

Carbohydrates are the body's primary source of energy, providing 4 calories per gram.

Proteins are responsible for building and repairing tissues, and they also provide 4 calories per gram.

Fats are used to store energy and insulate the body, and they provide 9 calories per gram.

Fats are essential for the absorption of fat-soluble vitamins, such as vitamins A, D, E, and K.

Proteins are necessary for the production of hormones and enzymes, which are essential for many bodily functions.

Carbohydrates are the body's preferred fuel source during exercise, as they provide quick energy.

Proteins are necessary for the production of red blood cells, which carry oxygen throughout the body.

Fats are the body's main source of cholesterol, which is essential for the production of hormones and cell membranes.

Fats are necessary for the production of myelin, which insulates nerve cells and allows them to transmit signals quickly.

Fats are necessary for the production of bile, which helps to digest fats by breaking them down into smaller molecules.

Fats are necessary for the production of phospholipids, which are essential components of cell membranes and help to regulate the passage of substances into and out of cells.

Fats are necessary for the production of prostaglandins, which are involved in a variety of bodily functions, including inflammation and blood clotting.

Fats are necessary for the production of leukotrienes, which are involved in allergic reactions and asthma.

Fats are necessary for the production of thromboxanes, which are involved in blood clotting.