What reason is some person skin black

summary

For all of us, we should pay close attention to our own health. Some people's skin seems to be darker than ordinary people. I can't help wondering what's the cause. Let me introduce to you what's the cause of some people's dark skin.

What reason is some person skin black

Reason 1: the internal pressure will make the skin produce similar stress performance. In the case of emotional stress, the skin will secrete nearly three times more melanin than usual. When people are very nervous.

Reason 2: the change of external climate will also indirectly affect the melanin secretion of skin. This is because skin melanin is a kind of protective reaction. Once external stimulation destroys the skin's natural defense system, the skin will secrete a lot of melanin to protect itself.

Reason 3: eat foods rich in tyrosine. Melaninase can lead to the production of melanin. In other words, melanin is transformed from tyrosine by tyrosinase.

matters needing attention

People with dark skin, when going out in life, take a sunshade, try to avoid ultraviolet radiation, and eat more food rich in vitamin C, hope to help you.