Nutrition is actually the body’s intake of food from the external environment, through eating and diet into the body of these foods, through the digestion of the gastrointestinal tract, the absorption and metabolism of the nutrients, thus using the nutrients in these foods, such as protein, fat, minerals, vitamins, carbohydrates, and other beneficial components, such as flavonoids, polyphenols organic acids, through Through these nutrients and beneficial substances, the body is supplied with energy, constitutes and renews body tissues, and is fully regulated throughout the physiological metabolic process. Therefore, nutrition is the food taken from the external environment through digestion, absorption, metabolism, and the use of beneficial components to promote our health is called nutrition.