Medical researchers believe that the color of human skin is related to the melanin content in the body. The pigment in soy sauce will not directly transfer to the skin, nor will it play a role in the synthesis of melanocytes, so it will not make the skin black.
Therefore, patients with skin wounds can rest assured to eat soy sauce after surgery.
Extended data
However, it should be noted that soy sauce is brewed and blended, the quality of brewing is guaranteed, and it is rich in amino acids, inorganic salts and other substances; However, soy sauce is generally blended with various additives and pigments, so customers should polish their eyes and see its ingredients clearly when choosing soy sauce.
References:
Can you eat soy sauce after operation?