It turned out that the SPF record is not as important in sunscreens

Buying sunscreen can be tricky. Whether to select the cream with photoprotective factor SPF 15 or 70? Spray or lotion? Prefer cream broad-spectrum or one funny that changes color when dry? Here's one way to save the skin and at the same time save money: take into account that the SPF factor does not play such an important role as you thought. It is important how you apply it.

It turned out that the SPF record is not as important in sunscreens

SPF - it's just a figure

SPF - the so-called sunscreen factor, ie a measure of protection against ultraviolet rays, particularly ultraviolet radiation spectrum Q. When it comes to sunscreen, most people believe that a higher SPF will provide better protection than low. This is true, but only to some extent. Sunscreen with SPF 15 blocks about 93 percent of UV radiation. Doubling this figure to 30, you increase the protection of up to 97 percent. A more expensive cream with SPF 50 raises this figure by only 1 percent, to 98.

"As you increase the sunscreen factor in the degree of protection is reduced to an insignificant difference," - he said in an interview NewYorkTimes president of the American Academy of Dermatology, Dr. David M. Pariser. Here's why: companies expect an SPF, comparing the time that a person needs to burn, without the protection, with the time that is needed to do this after applying sunscreen. Therefore, if you will burn without a cream, for example, 20 minutes, theoretically, you should hold 15 times as long as five hours, with cream SPF 15. Sounds impressive, right? However, sun cream itself will not last on the skin for so long. Sweat, friction and other factors - such as swimming - can lead to the termination of his actions, so dermatologists recommend reapply medication every two hours. In other words, it does not matter whether you bought Cream SPF 15 or SPF 100, because it is in any case cease to operate before the manifest difference in the degree of protection.

Worse, high pokazatelemSPF products can catch you off guard, giving a false sense of security. "People who use them tend to stay in the sun for much longer - says Steven Van for SkinCancerFoundation Fund. - They can skip the re-use, and they may think that there is no need to seek shade, wear a hat or cover your skin clothing. As a result, these people will have a much higher dose of UV radiation, which, of course, is contrary to their objectives. "

of a priority over the quality of

In fact, the main thing - to put the cream properly. According to the American Academy of Dermatology, most people deal less than half the required amount. For applying the cream on the whole body, you should use about 30 grams of cream. In addition, it should be applied in advance to at least 15, but better - 30 minutes before going out of the house. Remember that the SPF is only a measure of protection from ultraviolet radiation spectrum B. This is the rays that cause sunburn, but it is the spectrum of rays And basically lead to premature aging of the skin. To protect yourself against all harmful radiation range, find the cream of broad-spectrum, which protects against the two types of radiation. And finally, once again, because it is the most important thing: Apply plenty of sunscreen every two hours and immediately after swimming or sweating least. Important to have sunscreen on the skin itself, but SPF is not a panacea. And finally, the sunscreen has a limited shelf life. If you are storing your proven tool for several years, perhaps it is time to buy another package to be sure that you are protected.