1, increase the intake of lecithin: more intake of lecithin can prevent Alzheimer’s disease. In people’s recipes, soybeans and their products, fish brain, egg yolk, pig liver, sesame, yam, mushrooms, peanuts, etc. are foods rich in lecithin, which can provide beneficial nutrition for the brain after intake, improve intelligence and delay brain decline. 2, increase the intake of unsaturated fatty acids, vitamins, reduce salt intake: low-salt, low-fat diet helps prevent the occurrence of cardiovascular disease, vitamins (especially vitamin E, vitamin C) has the role of scavenging free radicals, slowing down the aging process. 3, eat more soybeans: soybeans are rich in isoflavones, saponins, oligosaccharides and other active substances, regular consumption of soy foods can not only ingest sufficient plant protein, prevention of dyslipidemia, atherosclerosis, and anti-cancer and prevention of Alzheimer’s disease and other effects. 4, eat more fish or appropriate supplementation of fish oil: fatty acids are abundant in fish, but also to prevent heart disease. Therefore, eat more fish, especially high-fat fish, such as salmon, trout and squid, etc., can effectively prevent dementia and heart disease. 5, reduce the intake of aluminum and copper: research has found that excessive intake of aluminum and copper can easily induce Alzheimer’s disease. In our food does not contain too much aluminum, but some food additives often have aluminum, such as household yeast powder, salt juice food fixing agent, cheese and soda crackers. Although its amount is not too large, but it is worth the attention of the elderly, not long-term or too much consumption. 6, the patient is suitable to eat food are (1) light nutrient-rich food, such as cinnamon date soup, lean meat, eggs, fish, etc., because such patients more Yin blood deficiency; and for those who are obese, it is appropriate to give a light diet, eat more fresh vegetables, fruits, such as celery, bean sprouts, cucumbers, bananas, oranges, etc.. (2) We should always eat foods rich in choline and vitamin B12, such as soy products, eggs, peanuts, walnuts, fish, meat, oats, millet, kelp, red curd, stinky tofu, cabbage and radish. Because acetylcholine has a memory-enhancing effect, and acetylcholine is all synthesized from choline. Therefore, should eat more choline-rich food (3) eat more roti, roti has a good brain effect. Nutrition information shows that the protein content of each 100 grams of soymilk, tofu and tofu is 1.8 grams, 8.1 grams, 44.6 grams; while the water content is 96 grams, 82.8 grams, 7.9 grams. It is easy to see that tofu is rich in protein and low in water content, which is related to the fact that it has been dried during the production process, absorbing its essence and concentrating the nutrients in soy milk. The nutritional value of tofu is high. 7, the dietary principles for dementia patients, emphasize the “three fixed, three high, three low and two quit”, that is, regular, quantitative, fixed quality, high protein, high unsaturated fatty acids, high vitamin, low fat, low calories, low salt and quit smoking, quit alcohol. Nerve cell activity and memory require sufficient protein, energy, lecithin, choline, vitamins, potassium, sodium, phosphorus and trace elements, so attention should be paid to the supplementation of nutritional elements.