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让这个夏天不再晒伤
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迪拜：如果你认为使用高防晒系数的防晒霜会保护你的皮肤免受夏天烈日的伤害，那你需要再重新考虑一下。
随着阿联酋国夏日的温度高至50摄氏度，许多人们都去购买防晒系数大于15的防晒霜。然而，专家说不同防晒系数的防晒霜的不同其实并没有那么明显。
迪拜Dr Batra’s Group 公司的创建者及主管Mukesh Batra医生说，防晒系数15,30，和50的防晒霜在保护皮肤免受紫外线伤害的水平上仅有轻微的变化。Batra说：“防晒系数15的防晒霜能阻挡93%的紫外线，防晒系数为30的防晒霜能阻挡97%的紫外线，使用防晒系数为50的防晒霜能阻挡98%的紫外线。”
对于那些普通的对光敏感的制革工人，或者有皮肤癌病史的人，这些在防晒系数上轻微的不同对人们造成的影响是十分不同的。
他说：“如果你未受保护的皮肤，在阳光的照射20分钟后就变红了，使用防晒系数是15的防晒霜理论上将会延长你皮肤变红的时间为之前的15倍（300分钟）。”
Batra 解释道：“由于人们认为使用防嗮系数越高的防晒霜将会提供更多的保护的常识性错觉，人们将会在阳光下呆更长的时间，认为他们的皮肤是一直受保护的。”
根据专家的建议，保护皮肤的关键是使用防晒霜的数量和频率。当你在阳光下或者沙滩上呆一整天时，保护皮肤的秘密就是每隔两个小时就涂一次防晒霜。
Batra医生说，研究表明大部分的人都不能有效的利用防晒霜。还说：“皮肤病专家建议，使用防晒系数为15的防晒霜，在出门之前就应涂抹1~2盎司的量，并使皮肤充分的吸收，每隔两个小时使用一次。”
Batra解释说道，当你一整天在沙滩上做游泳之类的活动时，有规律的使用防水和防晒系数为30的防晒霜就足够了。这是干燥的毛巾将会减弱防晒霜的效果。
Enjoy the summer without the sunburn
(From gulfnews)
Dubai: If you think using a sunscreen with the highest SPF (Sun protection factor) will help protect your skin from the harsh summer sun, think twice.
With temperatures in the UAE soaring as high as 50 degrees in summer, many people go shopping for sunscreen with an SPF higher than 15. However, experts say the difference in protection offered by sunscreens with different SPF’s is not all that significant.
Dr Mukesh Batra, founder and chairman of Dr Batra’s Group of Companies in Dubai, said there is a very slight increase in the level of UVB protection between sunscreen with SPF 15, and SPF 30 and 50. “SPF 15 will block 93 per cent of UVB rays, SPF 30 will block 97 per cent of UVB rays, and using SPF 50 will block 98 per cent of rays,” said Dr Batra.
For those regular tanners who are light-sensitive, or have a history of skin cancer, the negligible difference in SPF levels could make a difference.
“If it takes 20 minutes for your unprotected skin to start turning red as a result of sunburn, using SPF 15 sunscreen will theoretically prevent reddening 15 times longer [300 minutes],” he said.
Dr Batra explained that due to this common misconception that using higher SPF sunscreen will offer more protection, may people often spend more time in the sun under the belief their skin is protected.
According to experts, the key to saving your skin is quantity and frequency of sunscreen application. The secret to protecting your skin when you’re spending a day under the sun or on the beach is reapplying sunscreen every two hours.
Studies show that most people do not use enough sunscreen for it to be effective, said Dr Batra. “Dermatologists suggest applying 1-2 ounce of sunscreen with at least an SPF of 15, 20 minutes before going outdoors to help the skin absorb it well, and reapplying every two hours.”
Regularly applying waterproof SPF 30 sunscreen should be sufficient if you are spending a day on the beach as activities like swimming and towel-drying could decrease the effectiveness of sunscreen, explained Dr Batra.
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