During the process of wound healing and recovery, friends often caution: don’t eat dark-colored things like soy sauce and chocolate, or you will have scarring or hyperpigmentation. Are these live right? The cause of skin darkening: melanin production. When ultraviolet radiation acts on the skin in the basal layer of the skin, the skin activates the activity of the enzyme complexin to survive melanin with complexin as raw material. Many dark-colored foods are indeed rich in complexine, but non-dark-colored foods are also rich in complexine. Complexine is an amino acid that can be synthesized autologously, and even food control cannot organize it. So eating or not eating dark-colored foods during the wound healing process has nothing to do with the darkening of the wound.