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Summer is here, and there. To avoid sunburn – or worse – we all know, it's better to apply sunscreen. But researchers warn us against their effectiveness. And recommend recourse to the method of the teaspoon.
Index 30, or even index 50 for some. Once coated with sunscreen, we feel protected. And we generally do not hesitate to expose ourselves. Yet a study conducted by researchers at King's College London (UK) warns us. Sunscreens are not as effective as they say.
Or at least, they are only when they apply on their skin at least the amount used by the manufacturers to carry out their tests. That is 2 mg / cm 2 . Now, it seems that in organic matter, nitrogenous matter, etc.
There are different families like:
organic matter, which constitutes living beings (animals or plants) or … "data-image = "https://www.cdn.v5.futura-sciences.com/buildsv6/images/midioriginal/e/7/0/e70ccaaf4a_91935_matiere.jpg" data-url = "/ sciences / definitions / subject-matter-15841 / "data-more =" Read more "> material we tend to skimp by generally not applying more than 0.8 mg / cm 2 Result: sunscreen which shows a sun protection index of 50 would not provide more than 40% of the protection expected!
A spoon Coffee with sunscreen is what you need to protect your face from the sun. © Ipictures, Fotolia
The method of the teaspoon
The results of the British researchers still show that five days of exposure to high doses of UV rays with a 2 mg / cm 2 sunscreen remain preferable to a single day of exposure at a low dose of UV without any protection. But how do we know if we reach the famous 2 mg / cm 2 ? Using half a teaspoon for each arm, face and neck and a whole teaspoon for each leg, torso and the goal may be to badign an online service or a company's network in … "data-image =" https://www.cdn.v5.futura-sciences.com/buildsv6/images/midioriginal/e/e/e/eff315adf5_103383_deni-service-dos-ddos.jpg "data-url = "/ tech / definitions / internet-deni-service-2433 /" data-more = "Read more"> back .
And to be sure, researchers recommend opting for a even higher protection index than we think we need.They also point out that there are other effective means of protecting his skin from sunburn : wearing clothes cover and stay in the shade.
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