There are fish, shrimp, mutton, eggs, crabs, milk and so on. People will feel uncomfortable after eating these foods, especially the body parts with wounds, and they will feel that the wounds heal slowly or itch. Therefore, people think that these hair products should not be eaten often, especially after physical injury.

These ideas exist in the understanding of traditional medicine. From the perspective of modern science, especially through the precise detection of these so-called "hair products", we have not found any special difference in composition between these so-called "hair products" and other foods. Therefore, from the perspective of modern science, there is no such thing as "hair".

Extended data:

People will feel itchy after eating "Mao", which is a feeling of people. This feeling is subjective. When people are talking about a certain food is hair, eating it will affect wound healing. Under the transmission of these information, it will affect people's subconscious. Therefore, in the process of wound recovery, patients always feel that their wounds are recovering slowly. In fact, wound recovery always takes so long, but I feel slow.

People's Daily Online -24 1: What exactly is "hair"? Don't be silly, don't be confused.