Ultraviolet radiation from the sun is the most important condition for life on Earth, for all biological species without exception, including humans.. Even those living beings who can do without light all their lives, anyway, one way or another, albeit indirectly through food, but use its beneficial effect.. However, lately we have heard more and more often that being in the sun for a long time is harmful, that it provokes skin cancer and aging.. At the other end of the scale are suddenly sun-eaters, or pranoeds, who claim that you can eat only the sun's rays.. Let's try to figure this out.

Under the influence of ultraviolet radiation, many metabolic processes in the body occur, in particular, the synthesis of vitamin D.. Without this vitamin or with its insufficient amount, calcium metabolism in the body is disturbed, this is especially noticeable in children, and for them it is a great danger, since rickets develops.. Despite the fact that the skeleton of an adult is already formed, and rickets does not threaten him, with a lack of ultraviolet radiation, calcium metabolism is also disturbed.. The activity of this important element is not only in the fact that it is part of the bone tissue.

Calcium in the body ensures blood clotting, promotes the proper functioning of muscle tissue, is part of hormones and enzymes. All these most important processes for life support are disrupted with a lack of ultraviolet radiation, and the higher nervous activity, for which it is necessary, also suffers.. Everyone remembers that depressions intensify in the autumn-winter period..

Now that we have figured out the dangers of a lack of UV, consider the dangers of its excess.. If there is more ultraviolet radiation than the body can “assimilate”, it begins to have a damaging effect.. The skin is the first to suffer, everyone knows the summer sunburn.. The eyes also suffer - with an acute sunburn, electrophthalmia occurs, familiar to climbers, and a chronic excess of ultraviolet radiation leads to the formation of cataracts..

Experiencing excessive tension and the nervous system, which is expressed in the appearance of increased excitability, nervousness, fatigue. The mutating influence of ultraviolet radiation, which contributes to the development of skin cancer, cannot be discounted.. Oncologists know that under the influence of excess sun, the growth of malignant tumors accelerates..

Thus, it is impossible to answer unequivocally whether ultraviolet radiation is good or evil for the human body.. Like many other things that surround us in life, this is a blessing that, when abused, becomes its opposite..

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