1. Eat more shellfish, such as oysters, broken wood, black-bone chicken snails, etc.

2. Eat more foods rich in tyrosine, such as lean meat, eggs, milk and fresh vegetables.

3, eat more soy products, peanuts, black rice, black sesame seeds, raisins and so on.

4. eat less or not eat vegetables and fruits rich in vitamin C. Such as green pepper, tomato, citrus, grapefruit and so on.

5, do not eat spicy food.

6. Quit smoking and drinking.