Nowadays, there are many elderly people who choose vegetarian diet as their diet due to health or faith reasons. Vegetarianism is a beneficial way of life, but long-term vegetarianism should pay attention to the science of dietary matching according to the condition of the body, so as to avoid long-term partiality affecting the health of the body. Before starting a vegetarian diet, one can measure one’s height, weight, blood lipids, blood sugar and blood pressure. After a period of vegetarianism, the above indicators can be measured again to assess the effectiveness of vegetarianism. During the period of vegetarianism, you should pay special attention to the frequency and shape of stools, luster, weight gain or loss, physical strength and activity level, sleep time, and changes in eyesight. If you experience discomfort, poor mental health, lack of physical strength and other reactions during your vegetarian diet, you should immediately seek help from a nutritionist so that you can keep track of your physical condition. In the diet with: 1, you can eat more cereals or soy products, or take a multivitamin every day, mainly to ensure that the intake of vitamin 12. 2, sound bone development, prevention of osteoporosis: sun exposure and exercise. This is the only way to ensure that the body can naturally synthesize Vitamin D in the bones. Eat more dairy products, or soy foods, seeds, beans, or dark green vegetables to ensure calcium intake. Remember, calcium and vitamin D work together to make bones strong. 3. Improve immunity: Eat more grains and cereals, especially brown rice or whole wheat bread. 4, the technological advances in food processing, vegetarian processed products can simulate a variety of vegetarian meat texture and flavor, in terms of materials, in addition to the traditional direct processing of beans to produce, and now more soybean extracts, soybean isolate protein, but also mushroom extracts and so on. Elderly vegetarians should also pay attention to the use of more oil in cooking; vegetarian diet is also often accompanied by high-sugar, high-oil snacks, such as fried taro balls, taro cake and other fried snacks; there are many vegetarians who will eat a lot of fruits, but ignored that some of the fruits are very high in sugar; some vegetarians think that they can eat more, and the result is that they will still eat the problem of overweight. Avoid eating too much pickled food and salty flavors.