Vegetarian food is healthier. The prevalence rates of nutritional anemia, energy malnutrition and lack of multivitamins and inorganic elements in protein for long-term vegetarians are higher than those of ordinary people, and their physique and average life expectancy are not dominant. Therefore, quasi-vegetarians need to catch up with special nutrition knowledge before putting it into action, or choose a staged vegetarian diet to avoid the lack of nutrition.