In life, many people believe in such a sentence - "If there is trauma on the body, you cannot eat soy sauce, otherwise the wound will be blackened and leave scars."
But in reality, there is no scientific basis for this.
On this issue, we need to explain from the following two aspects:
01 Causes of skin darkening
The reason why the skin has a color has a lot to do with "melanin".
Melanin is a biological pigment found in the skin or hair, and its production requires the raw material - tyrosine.
In simple terms, tyrosine reacts to melanocytes and then releases melanin.
02How does soy sauce come from?
As a traditional condiment of Chinese food, soy sauce is a product of fermented soybeans, mainly containing amino acids, salt, water and other substances.
Although soy sauce does contain a certain amount of tyrosine, its content is very small, even less than milk, soy milk, barley and other foods.
Moreover, even if this tyrosine is present in soy sauce, it may not become a catalyst for blackness.
Because tyrosine is not tolerant of strong acids, after entering the stomach, it will be inactivated by gastric acid, and it will lose its biological activity that can "do things".
Therefore, whether a person is injured or not, eating soy sauce will not make people or wounds black.
The real thing to guard against is "daylight"!
As mentioned above, the substance that causes the skin to darken is melanin, which is secreted by melanocytes in the epidermis.
When ultraviolet rays are irradiated on the skin and act on the basal layer of the skin, the skin will be in a state of "self-protection", activating the activity of tyrosinase and using tyrosine as a material to produce melanin.
After we are injured, because the newborn skin is more delicate, the melanin calm after the superficial wound heals, to some extent, it is a self-protection mechanism of the body, which helps to fight against ultraviolet damage.
Therefore, if we don't want to leave scars on the wound, the first thing we have to do is not to eat soy sauce, but to reduce the sunshine!
Source: Wellness China
Editor: Yu Luoyin
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