Why is black healthy?

It's a little verbose upstairs. Hehe, the so-called black health is actually a kind of prejudice, not necessarily but also reasonable. Black is the reason why skin contains more melanin. On the one hand, we usually turn black when we spend more time in the sun, and more time in the sun will increase the vitamin D precursors synthesized by the skin. This will promote the body's absorption of calcium. Play a role in supplementing calcium. It is for this reason that children who get more sunshine can prevent rickets. On the other hand, blacks spend more time in the sun because of outdoor activities or manual labor. This will undoubtedly make you healthier. Moreover, more exposure to the sun will increase a substance secreted by the human brain, which will increase people's excitability, that is, it can prevent depression.

To sum up, it makes sense to say that black people are healthy. But it is also related to heredity. Not exactly.