These titles are not particularly authoritative. At present, they are mainly nutritionists and Chinese medicine practitioners. Nutritionists look at different customers and provide different services, such as community, private, family and so on. When you say dietotherapy, it should be private or family. Private dietotherapy is to open a shop, provide consulting services and sell some dietotherapy formulas. Those who enter the family charge a fixed fee of one month, usually one or two thousand and one months, and directly enter the family to provide services, improve diet and so on. Medicinal diet, as long as nutritionists are slightly involved, can simply provide some prescription guidance, but it is not as comprehensive and safe as traditional Chinese medicine, and the effect is so targeted. General nutritionists are not very good at guiding medication, mainly relying on food conditioning. Nutrition and health preservation can not replace drug treatment, but can only play an auxiliary conditioning role. Dietotherapy also involves some medicated diets, but it cannot be included. Nutritionists should do their job well and not involve drugs too much, which violates the essence of nutrition. The last question of medicated diet is not clear to me personally. I feel that medical diet should pay attention to safety. There are many kinds of traditional Chinese medicines with different effects. It is not enough to study medicated diet systematically and in detail.