讓面板科醫生告訴你，防晒霜究竟能防晒多長時間
How Long Your Sunscreen Actually Protects You, According to Dermatologists
讓面板科醫生告訴你，防晒霜究竟能防晒多長時間
Protect your DNA!
保護你的DNA
Sun-soaking season is here, and that means if you don't lather up with sunscreen, you could be doing serious damage to your skin cells' DNA, setting yourself up to develop a potentially deadly form of cancer.
最適合陽光浴的時節已經來到，這意味著如果你不適當塗抹防晒霜的話，強烈的日光很有可能會嚴重損壞你面板細胞的DNA，最終導致你得上一種可能致命的癌症。
Melanoma kills more than 10,000 Americans every year, according to the Skin Cancer Foundation.
根據面板癌基金會的資料顯示，在美國，每年因黑色素瘤去世的人就高達一萬多名。
Those deadly cancer cases are typically caused by UV radiation you get from either baking in the sunshine, or lounging in a tanning bed.
這些致命的癌症病例通常是由於日光浴中強烈的紫外線輻射造成的，或是因為使用美黑儀器導致的。
Indulge in either of those often enough, and you may start to develop cancerous moles. If those marks aren't caught in time, the melanoma can spread to other areas of your body, and become tough to control, even deadly cancer.
經常長時間地接觸日光或美黑儀器，你就有可能會開始長出帶有癌變性質的痣。如果沒有及時發現這些“印跡”的話，黑色素瘤就可能蔓延到你身體的其他部位，變得難以控制，甚至會引起致命的癌症。
So it's important to lather up with some protective sunscreen if you're going to be spending time in the sun - especially during warmer summer months, when the UV Index rises and the sun becomes more potent.
因此，如果要長時間暴露在陽光下——尤其是在炎熱的夏季，紫外線指數升高，日光變得更強烈時——及時塗上一些防晒霜變得尤為重要。
We enlisted the help of two skin experts to explain just how long sunscreen lasts and how to re-apply it correctly. Here's their best advice:
我們邀請了兩位面板專家來幫助我們瞭解防晒霜的持續時間以及如何正確地再次塗抹防晒霜。下面是他們提供的最佳建議：
Your sunscreen SPF is only 100 percent guaranteed for two hours after you put it on
當你抹上防晒霜之後，其SPF的100%效力只能保證兩個小時
"When we talk about reapplying sunscreen every two hours, that number comes from how SPF is tested," John Zampella, a dermatologist at NYU Langone Health, said.
“當我們建議說每隔兩個小時就要重新塗抹防晒霜時，是因為這個數字來自於SPF值的測試方式，”紐約大學朗格尼醫學中心的面板科醫生John Zampella說道。
He explained that SPF numbers are based on how much protection a certain sunscreen will give you against the sun for two hours.
他解釋說，SPF值是基於某特定防晒霜在兩個小時內抵禦陽光的能力得出的。
When you're active and enjoying the sun, like at the beach or a ballgame, it's important to reapply after that.
當你一邊運動一邊享受陽光時，比如在沙灘上嬉戲或參與球類運動，最重要的是在活動結束後必須重新塗抹一次防晒霜。
If you put on an SPF of 50 at 10 a.m., by noon, "you're probably still getting some protection, but your SPF 50 is no longer accurate," Zampella said. "Maybe you're getting SPF 10 at that point."
如果你在上午10點塗上了SPF 50的防晒霜，那麼到中午為止，“你可能還能獲得一些保護，但此時SPF 50的防晒能力就得不到保證了。 ” Zampella 說 ，“也許你在那個時候只能獲得SPF 10的防晒效果。”
For full-fledged protection, use at least SPF 30
為了獲得全面保護，請至少使用SPF 30的防晒霜
That's what the American Academy of Dermatologists suggests.
這點是美國面板科醫學會給出的建議。
SPF 30 also happens to be the dose that skin expert David Leffell, author of "Total Skin: The Definitive Guide to Whole Skin Care For Life," and chief of dermatological surgery at Yale School of Medicine, keeps on hand for himself at home.
《全面護膚：全面護膚生活的權威指南》作者，耶魯大學醫學院面板病外科主任David Leffell平時給自己使用的防晒霜指數也恰好是SPF 30。
For most people, that protection factor gives enough of a shield to fight off about 96% of the damaging, burn-inducing UVB solar rays outside, whether you're at the beach or on the golf course.
對於大多數人來說，無論是在海灘還是在高爾夫球場上，這種防晒成分都足以抵擋96％以上來自外部，具有破壞性且會引起灼燒感的UVB太陽射線。
Sensitive and fairer skin tones may opt for SPF 50 to get a little extra boost of protection, but Leffell says any SPF higher than 50 only offers minimal extra benefit.
敏感面板和偏白的膚色可能需要選擇SPF 50來獲得額外的保護，但Leffell說任何SPF值超過50的防晒霜能提供的額外好處十分有限。
It's especially essential to 'refresh' sunscreen in certain burn- and skin cancer-prone areas of the body and face
在身體和臉上某些易晒傷且易得面板癌的部位“反覆塗抹”防晒霜，這一點尤其重要
That includes the top of the ears, the forehead, the cheeks, and the nose.
這些部位包括耳尖，前額，臉頰和鼻子。
Carry sunscreen with you during the day
白天的時候隨身攜帶防晒霜
Zampella says he totes a bottle of sunscreen with him every day.
Zampella說他每天都會帶著一瓶防晒霜在身上。
"Do I apply it every two hours? Probably not," he said. Realistically, he's probably applying twice a day while in the city. But he's more vigilant when he's spending the entire day outside. "At the beach, I do try and get it on every two hours."
“我每隔兩個小時就抹一次嗎？那不一定。”他說。實際上，在城市裡，他可能每天只需要塗兩次。但如果他要在外面度過整整一天時，他對此變得更加敏感。“在海灘上，我確實需要每兩個小時就補塗一次。”
Make it a daily habit
讓抹防晒霜成為一種日間習慣
According to Leffell, you should make putting on sunscreen everyday a part of your morning routine, "just like brushing your teeth."
根據Leffell的說法，你應該每天早上都要抹上一層防晒霜，“就像刷牙一樣。”
"By making it a regular behaviour , you have a much increased chance that you won't see it as an annoyance, and that you won't forget to do it," he said.
“讓這成為一種習慣，這樣你便更有可能每天會記得這樣做，且不會將之視為一種麻煩。”他說。
Zampella agrees. He says making sun care a daily reflex will "give you the best long term benefits of both skin cancer prevention and also anti-ageing protection."
Zampella表示贊同。他說每日做好防晒工作可以“給你提供效果最佳的長期益處，無論是預防面板癌還是抗衰老。”
Women should pay extra attention to their chest, while men should watch out on top of their head
女性應該更加註意自己的胸部部位，而男性則應該注意自己的頭部
Leffell says women should be especially careful to protect the "v" of their chest from getting burned, since damage there is "very hard to reverse cosmetically with lasers."
Leffell說，女性應該特別小心保護胸部的“v”字部位不被晒傷，因為一旦損傷那一塊位置，就“很難用鐳射美容修復了”。
For men, he recommends anyone who's lost a bit of hair should liberally apply sunscreen to their bald spots and their neck, and probably add a hat.
對於男性來說，他建議任何呈現脫髮傾向的人都應該在他們脫髮的位置和脖子上多塗抹一些防晒霜，並且有可能的話，最好戴上一頂帽子。
"We see a lot of skin cancer on the scalp," he said.
“我們見到很多面板癌都發生在頭皮上。”他說。
Once you've lathered up, get out there and enjoy a little sun!
一旦你塗好了防晒霜，就可以大膽走到戶外，享受陽光！
There's plenty of scientific research that suggests a little sunshine on a regular basis can be good for your bones, your mood, and your waistline.
有大量的科學研究表明，定期的晒太陽會對人的骨骼，心情和腰圍都有益處。
