Fact or myth: waterproof sunscreen does not exist
It is plenty of summer and also last week showed the sun again see on a regular basis. NU.nl put nine theses on zone protection for huidexperts of Dr. Jetske Ultee.
1. If you factor 50 rubs, you do not become brown: fable
No single factor will protect you 100 percent against the rays of the sun. Also a factor of 50; this approximates the 98 percent, and that is, in fact, but one to two percent more than a factor of 30. And that applies only if you have plenty of rubs. In addition, we know from research that almost everyone, not enough thick grease to the indicated SPF to achieve. Either: the skin will eventually discolor if there is a SPF 50 is opgesmeerd.
2. You need to get the hours you sun protection ‘refresh’: myth nor fact
“Unfortunately, no sunscreen retains its effect the whole day. The factor to keep that on the packaging, you need the cream anyway, every two hours, re-apply. The efficacy of the filters takes off after application. The speed at which that happens depends on your skin type, the strength of the sun, your activity (swimming, sports) and used zonfilter. On days when the sun is powerful is shining and/or when you have a lot of swimming or sweating, it is indeed good to have your sun protection every hour, or after each swim, to refresh.”
3. In the shadow you can’t burn: fable
“In the shade can burn the skin. In recent years, is still a research published by American scientists in which it was shown that a parasol is insufficient protection. Umbrellas indicate however, uv-radiation and reflecting solar radiation reach the skin. It is therefore important that you also insmeert when you are in the shade.”
4. Windows keep harmful uv rays: myth
“Windows keep only uv-B rays, uv-A radiation can have (in part) by the glass (and clouds). By uv-A radiation burned you’re not. So you get no warning. But uv-A rays penetrate deeply into the skin, where they damage DNA and hasten aging. The connective tissue is affected, and the elasticity of the skin decreases. Also increase uv-A-rays, the risk of skin cancer.
In 60 seconds: sunscreen
5. Factor 50 is for people with light skin are the only sensible choice: fable
“People with light skin or people who suffer from pigment, and is (the whole year) by a factor of 30 or higher is recommended. As well as less loyal smeerders. As said before, does not have any uv filter you 100 percent. Also a factor of 50; this approximates the 98% and that is only one to two percent more than a factor of 30. Sunblocks with extremely high factors are sometimes less nice in use and contain many more ingredients that for skin problems can ensure. To keep your skin sufficient amounts of vitamin D and pigment for protection to be able to build, it is therefore better to daily on the right way, a slightly lower factor use. Ultimately that is even much better than your skin the whole year through, not to protect and then only one summer vacation a heavy sunblock to use.”
6. Every time you swim, you should reapply the cream: fact
“That is indeed wise. Products that waterproof, are, in fact, not (more). That claim may, fortunately, no longer be used, because it is misleading. Bathing (and towel drying) for the decline of your SPF. Nowadays, you can see by the way terms such as water resistant. These products are added ingredients like wax, oil, or polymers that make the product more resistant for water. If you do a lot of swimming or poor smeerder, then it is safer to have for such a cream then choose a product that is not waterproof.”
“The strength of the sun is not going to be different than on your towel on the beach. ”
7. Also if you don’t go out in the sun, you need sunscreen: fact
“Whether you’re sitting on the bike, at the zoo walking around, or a walk, the strength of the sun is not going to be different than on your towel on the beach. Also, if you ‘just’ outside, it is so good to have you in to be lubricated. It is actually the all year round important to protect the skin against the rays of the sun. Also in the winter, or on days that it is cloudy.”
8. Also by your clothing, you can burn: fact and fable
“The protection afforded by clothing, the skin offers, depends inter alia on the thickness of the fabric and the material. A heavy jeans naturally means more rays than a thin shawl. A white T-shirt has about an SPF of 5. Is the shirt wet, then there will remain of the protection, nothing more. So you can still end up unnoticed burn (summer)clothes. There is also special uv protective clothing.”
9. Sand on the beach you can protect a ‘scrub’: fact and myth
“By friction of the skin with clothing, towels or, for example, sand will be the protection of the sunscreen is indeed declining. Conversely, his arms and legs under the sand are also a little more protected from the rays of the sun.”