1, beef. Beef is also rich in protein, vitamin B 12 and zinc, which is beneficial to nerve health, but excessive red meat will increase the risk of diseases such as diabetes and heart disease.

2. Cashews. Cashews also contain healthy fat, folic acid, zinc, B vitamins and vitamin K. Salt-free cashews are very healthy snacks and can also be eaten in stir-fried dishes or cold dishes.

3. Chicken. Chicken is an important food source of vitamin B6, which is beneficial to the normal function of the brain.