Vegetarianism refers to a dietary pattern that does not include animal based foods such as livestock, poultry, fish, shrimp, etc. It is divided into whole vegetarian, ovo vegetarian, lacto vegetarian, ovo lacto vegetarian, etc. "Chen Tong, deputy chief nutritionist of the Clinical Nutrition Department of Beijing Anzhen Hospital, introduced that the diet of vegetarians mainly consists of refined white rice and flour, miscellaneous grains, soybeans and their products, vegetables and other foods. Different vegetarians have their own characteristics. For example, vegans do not eat all animal based foods and only consume plant-based foods such as grains, vegetables, fruits, nuts, and beans. Egg vegetarians or dairy vegetarians do not eat meat, and do not restrict the intake of egg based foods such as eggs and quail eggs, or milk and its products. The amino acid pattern of egg based foods is similar to that of the human body and is considered a high-quality protein with high nutritional value. Egg and dairy vegetarians do not eat meat and do not limit their intake of eggs and dairy products. In Chen Tong's opinion, if we eat a scientific diet, only vegetarian food can meet the energy needs of most human activities. Carbohydrates, fats, and proteins are the three major nutrients that provide energy for the human body. Carbohydrates are mainly found in grains, fruits, and starchy vegetables; Most fats are found in meat products, but nuts, milk, eggs, grains, beans, and other foods also contain fats; Protein can come from a wide range of sources, including animals and plants. In addition, eggs, milk, and their products are also rich in protein and belong to high-quality protein. The School of Public Health at Shanghai Jiao Tong University School of Medicine and other units jointly investigated and analyzed the protein nutrition status and food sources of 282 vegetarians in Shanghai. The survey results show that although vegetarians have slightly lower daily total energy intake than non vegetarians, there is no significant difference in protein energy supply between the two. However, we advocate for a balanced diet, which involves consuming moderate amounts of high-quality protein such as meat, eggs, and dairy products, as well as vegetables, fruits, nuts, and other foods Chen Tong said. (New Society)