The functions of food are generally divided into two types: nutritional function and sensory taste function. The former is called primary function and the latter is called secondary function. However, recent scientific research shows that food also has biological regulation function, that is to say, food contains various systems that can regulate the body, such as immune system, nervous system, digestive system and circulatory system. After the human body ingests these ingredients, it can directly promote health and accelerate recovery after illness. I think the so-called functional food is an industrialized food that emphasizes that its ingredients show the body's defense function, regulate the physiological rhythm, prevent diseases and promote rehabilitation. Functional food is sometimes called health food. They are toxic and harmless and meet the nutritional requirements; Of course, its function is clear and specific, and it cannot replace normal dietary intake and the need for various essential nutrients; It is not for the purpose of treatment and cannot replace the therapeutic effect of drugs on patients.

Personally, I think the main concern is the regulation of functional foods on human functions. Mainly has the following functions: enhancing immunity, delaying aging, assisting in lowering blood fat, blood sugar, blood pressure, resisting oxidation, assisting in improving memory, relieving asthenopia and physical fatigue, losing weight, promoting growth and development, promoting digestion, relaxing bowels, beautifying, and resisting tumor. Generally speaking, it is a course based on health knowledge and health food, and it is also a broad knowledge of healthy life and green life.