"Xiao Zhang recently hurt his knee and has been afraid to eat soy sauce during the recovery period. Because I heard from friends around me that during the wound healing, don't eat dark foods such as soy sauce and chocolate, otherwise the new skin will turn black and leave scars. You can't eat soy sauce if you have a wound?

Wang Yongchun, an associate professor of dermatology in the Fourth Affiliated Hospital of Harbin Medical University, said that he was often asked this question by patients in outpatient service, but this statement made no sense. Whether the wound heals well or not will leave scars mainly depends on the size of the wound, the degree of infection, whether debridement and suture are done well during treatment, whether anti-infection is in place and the nutritional status of the human body. Zheng Dongming, a nutritionist in the Fourth Affiliated Hospital of Harbin Medical University, explained that the "black suspicion" of soy sauce mainly comes from its two components, amino acids and tyrosinase. First, amino acids do not promote the formation of melanin. The black color of soy sauce comes from the caramel pigment contained in it. Even if it is absorbed by the human body, it will not be transmitted to the skin. Secondly, soy sauce contains no catalyst to promote melanin synthesis, and tyrosinase cannot tolerate strong acid. No matter whether soy sauce contains tyrosinase or not, it will be inactivated by gastric acid when it enters the stomach, losing its biological activity of catalyzing chemical reactions. Therefore, it is only a legend that eating soy sauce will make the wound black.

Wang Yongchun pointed out that the depth of food color does not affect wound healing. As for the blackening of the skin at the wound, the main reason is that after the skin cells are damaged, the activity of tyrosinase is activated, which leads to the formation of melanin and makes the skin look a little black. But with the gradual repair of skin cells, melanin will slowly decompose until it disappears. In addition, if the skin is exposed to ultraviolet rays for a long time during wound healing, it will also lead to skin blackening. Therefore, during the period of wound healing, it is not necessary to avoid eating dark food, but to do a good job of anti-infection and sun protection and avoid eating spicy and irritating food. Need to be reminded that soy sauce has a high salt content, so it is necessary to reduce the salt intake. "

Plus 3M Scar Sticker and Bak, they are all prescribed by plastic surgery hospital.