Childish behavior is the clinical manifestation of Alzheimer’s disease dementia. How to prevent childish and stupid behavior: 1. A large intake of vitamin B12 and folic acid is beneficial in preventing Alzheimer’s disease. Researchers analyzed blood samples from hundreds of subjects and showed that those with blood levels of vitamin B12 in the lower 1/3 of the normal range were more than three times more likely to develop Alzheimer’s disease, while those with similarly low levels of folic acid were two times more likely to develop the disease. This is because vitamin B12 deficiency can cause changes in the structure and action of transcobalamin I in the body. This leads to a failure of immunoglobulin production and a weakened ability to fight disease, causing severe nerve cell damage. This study also found that people with vitamin B12 and folic acid deficiency had the highest concentration of cysteine (a potentially harmful amino acid), and those whose levels were at the upper 1/3 of the normal range were 35 times more likely to develop dementia. Therefore, special attention should be paid to adequate vitamin B12 and folic acid supplementation from food, which is convenient, effective, safe and economical. Foods rich in vitamin B12 include shellfish, eggs, milk, animal kidney and various fermented soy products (such as tofu milk). Folic acid is widely found in various animal and plant foods, and folic acid-rich foods include green and yellow leafy vegetables, yeast and animal liver and kidney. 2, pay attention to the supply of the brain indispensable trace elements and macronutrients. For example, iodine is an important component of thyroxine, lack of which will be irritable due to low thyroid function, weak interest, intelligence decline, iodine exists in a variety of seafood, zinc is the brain protein and nucleic acid synthesis of essential substances, when the body is zinc deficiency 48h that produce protein synthesis disorders, interference with cell division, resulting in a decline in intelligence. Foods with high zinc content include fish, meat, eggs and nuts, etc. Calcium, for the brain, can inhibit abnormal excitation of brain nerves, so that the brain enters a normal work and life state. Conversely, the brain in the level of calcium deficiency, will cause emotional instability, so that the brain fatigue. Severe calcium deficiency will increase bone calcium leaching, causing calcium deposits on brain cells and their peripheral nerves, destroying and interfering with brain function and causing dementia. Calcium-rich foods include milk, beans, sesame paste, shrimp, fish, etc. Calcium deficiency also leads to aluminum deposition in brain cells, and the amount of aluminum in certain brain areas of Alzheimer’s patients is 10 to 30 times higher than normal. Aluminum is a powerful cross-linking agent that directly destroys genetic material within nerve cells, causing cellular crumpling, which can lead to broken interneural connections and cause memory damage. Foods containing more selenium include lamb, turkey legs, chicken liver, powdered beef milk, eels, mackerel, striped bass and other meat foods, all containing more than 30 mg per 100 grams, cabbage, onions and seafood are rich in content and available for consumption. 3, free radicals is the bane of dementia. Modern science proves that the antioxidant nutrition of the effective substances to destroy free radicals are mainly vitamin C, vitamin E, beta-carotene and selenium. Enzymes, or enzymes, are proteins that promote a series of chemical reactions in the human body. Enzymes are destroyed when exposed to heat. The enzyme that slows brain decline is peroxidase, the raw material of which exists in large quantities in the young stems of cauliflower, fresh peas and alfalfa. A deficiency of histidine enzyme, which affects learning and memory, is a wonderfully large natural resource that can be found in fresh fruit, especially apples.