As there is a sun
The color is tan human skin gives a coloring substance melanin, produced by the body as protection against ultraviolet radiation. Melanin is formed each person, except maybe albinos. But much depends on belong to the human race. Fair-skinned people melaminovye cells are quite small and have low density. The increase in both parameters makes the skin darker. We can say that Africans melanin is produced in 2 times more than for example Scandinavians.
Dark-skinned people planning a long stay in the sun, it is imperative to use sunscreen.
Dark skin also tans
However, the assertion that black people are better protected from harmful solar radiation and thus absolutely no risk of skin cancer, is fundamentally wrong. Purely visually, the difference between tanned and untanned blacks may not be so noticeable. Moreover, only a small part of the population of African descent can boast a completely black skin color. In the bulk of the color type they varies from dark brown to shade "coffee with milk". And if the European and the African will hold the same amount of time under the sun, the first time to very severe burns while the second will only be a semitone darker. That is get a tan.
However, for black people the sun can be even more dangerous than their light-skinned counterparts. On the one hand, they too have light skin, able to burn without protection. First of all we are talking about feet and hands. Secondly, it is the dark skin color gives you time to recognize a sudden melanoma. If the white man saw this education, immediately go to the doctor, a dark-skinned miss precious time simply because they don't even know is seriously ill, and continues to be exposed to deadly radiation.
Negros are 10 times less likely to develop cancer of the skin, but the percentage of deaths among representatives of this race are disproportionately large.
Dark skin can also burn
Therefore, we can say that blacks not only sunbathing, but quite a able to burn or even cancer of the skin. That is, dark skin is not an absolute protection from harmful effects of sun rays.
Advice 2: Is it good to tan?
The benefits of the sun
The sun gives light and life. It is necessary for plants and for animals and for people. With it produces vitamin D. enjoy the sun much more interesting than to take fish oil, which it replaces. The sun's rays help the body better cope with diseases. They contribute to the strengthening of tooth enamel and bone tissue.
Because of the action of ultraviolet rays is lowered cholesterol levels, reducing blood viscosity, the destruction of harmful bacteria and viruses and enhancing tissue respiration, restore metabolic processes. It also promotes the synthesis of protein, different enzymes and hormones.
Do I need a tan?
Not to say that tanning is harmful or helpful. It signals that the person for some time was in the sun. The sun promotes the production of melanin. Melanin protects the skin from burns and gives it color. When tanning, this means that being in the sun was short-lived. But if it is strong, then the norm of sunlight is exceeded. Solar radiation in high doses can be dangerous. Burns and sunstroke is not so terrible, but can occur and grow different serious illness.
What time to sunbathe?
Do it in the morning or evening. In the daytime the rays of the sun aggressive, and the air is too humid, so it is possible for deep penetration of the rays into the skin. This causes rapid aging. At this time, be sure to hide the umbrella.
How to safeguard yourself?
Sweat protects the skin. It contains rocanova acid. It absorbs ultraviolet radiation. The skin is very sensitive, when the wind blows, and when you exit the water. Try not to sunbathe.
After a long day of sunbathing the skin needs to be cool and moisture. The redness tells about the sun burn. But if it was not, still use creams, lotions and masks, which allow you to cope with minor injuries. Also, use sour cream, kefir and yogurt.
It is important that you have not used the tools that lead to blockage of the skin and increased blood flow.