Does eating soy sauce really make your skin black?

In daily life, often listen to the older generation said that eating more soy sauce skin will turn black, especially when there are wounds, eating soy sauce will make the healing wound color darkerSo, is there any scientific basis for this? Today let's explore whether soy sauce has anything to do with skin blackening or wounds blackening"what to eat to make up what, eat soy sauce will naturally turn black"It sounds reasonable and well-founded, but it's notZhang Guoyi, director of the outpatient department of the Institute of Dermatology of the Chinese Academy of Medical Sciences, said that soy sauce is just a condiment, made by grain fermentation, the main ingredients are amino acids, organic acids, sugars and pigments, and other foods, like other foods, will be broken down after consumption, converted into substances absorbed by the human body, and do not have the function of directly entering the blood into our skinIn addition, it has not been found that soy sauce has increased light sensitivity, nor will it affect the body's hormone synthesisSoy sauce contains a pigment called melanin, which is just a natural pigment that is largely broken down after entering the gastrointestinal tract and is not absorbed by the bodyTherefore, eating soy sauce does not darken the skin, there are also claims that eating soy sauce after injury can turn the healing wound blackTao Chengjun, director of the dermatology department of Hangzhou Central Hospital in Zhejiang Province, told qianjiang Evening News that the skin after the injury will go through two processes, one is the formation of scars, that is, the skin fiber tissue growth; When the skin has inflammation, in order to ward off the invasion of outside microorganisms such as bacteria, the body releases some inflammatory media locally to activate the local immune responseThese inflammatory media stimulate melanocytes and can lead to local pigmentationSo if the wound heals slowly, the inflammatory stimulation exists for a long time, or it may leave pigmentation, so that the local skin color is always deeper than the normal skin color around, and do not eat soy sauceif the skin color is hard to correlate with what to eat, the Workers' Daily said that the medical people recommend that when there is a wound to eat as little light-sensitive dishes, such as celery, white radish, leeks, spinach, because they contain more copper, iron, zinc and other metal elements, these elements will improve the activity of tyrosine enzymes in the body, increase the synthesis of melanin(Wang Sihan)This article by the China Center for Disease Control and Prevention Nutrition and Food Safety Research Fellow He Li scientific controlSource: People's Daily