Myth One: The sunscreen is not required, imposed on us marketers
The argument contains considerations that for centuries the inhabitants of southern regions, as well as sailors, farmers were constantly in the sun — and nothing bad happened to them.
The fact that the southern people, as well as representatives of the professions, including the work of "the great outdoors", had a habit of constant year-round sun. They are much smaller burns were darker. But the skin of people who go lie on the beach for two or three weeks a year, does not have time to adapt to the changing conditions. It is under stress, burns stronger, there is a greater risk of melanoma.
A simple example: according to statistics, in Israel and Australia, the largest number of cases of skin cancer — the ex-refugees from countries with a colder climate and less active sun, who came to this country less than 10 years ago. Indigenous people and Australian Aborigines face melanomas are much less common.
And more: in addition to the protective function of all of these creams are actively moisturize the skin. Guess whether the proponents of a natural tan, appealing to the fact that the sailors and peasants were sunbathing without sunscreen that skin these people were not in perfect condition?
Myth Two: creams with a high degree of protection can be applied once a day
Creams with a high protection factor evoke the feeling of security. However, this feeling is false.
The fact that any sunscreen (whether cream or spray) works on the principle of microscopic zerkalets reflecting the sun's rays. Between these microscopic "mirror", distributed in the skin, in any case remain microscopic gaps. The sun's rays that fall into these gaps can cause a burn. Therefore, the more regularly you put Sunscreen cream, the greater the certainty that this "mirror" fall on different parts of the skin.
Manufacturers recommend to apply sunscreen every two hours, doctors advise not to disdain to do it every hour. And in any case, should not rely on the existence of a cream that can be applied once and for all.
Myth three: the higher the factor protection more secure Sunscreen cream
On the sunscreen protection factor near, manufacturers sometimes write more explanation: for a light, very light or, conversely, for dark skin. Some try to perform calculations based on the specified rate on the tube protection. For instance, cream by a factor of 60 was supposed to be 6 times more reliable than a vehicle by a factor of 10.
And if the cream with factor 10 protection must be reapplied about once an hour, it is logical to assume that a sunscreen with a factor of 60 can be updated at least 6 times. Nothing like this: cream protection factor 10 reflects about 92% of ultraviolet rays, while cream factor 60 — about 98%.
In addition, a cream with a high protection factor blocks the natural alarm, which is redness of the skin. That is when the skin is reddened with the cream with a high degree of protection, the diagnosis is relentless — severe burns. Therefore, manufacturers of sunscreen have come to a conclusion about the need to switch to other notation: instead of specific numbers to write Cream — low, medium or high security.
Myth Four: creams with a high protection factor hazardous to health
Under health is meant primarily the risk of cancer. The paradox: on the one hand, dermatologists say that tanning without sunscreen can greatly harm, but on the other hand, in the media periodically start talking about what sunscreens funds with a high protection factor lead to cancer.
The fact that at the beginning of the nineties in the U.S. were conducted studies on UV-A-filters (or protecting from rays of type A). UV-B type were then not yet known. Once it became clear that it was the rays of the B-type are the main danger, sunscreens are composed of filters that protect from the rays of the two types, the results were made public. Because of the hype, few paid attention to the fact that it was a previous generation of sunscreens that can only filter UV-A.
The fifth myth. People with dark skin can not use sunscreen
Sunburns are becoming — and smuglokozhih, and the white man. It's just a matter of time to get burned fifteen minutes earlier or fifteen minutes later.