不畏強光，智慧防曬
There are many misconceptions with sunscreen. You have those people who think that getting the highest SPF will protect them better than a lower SPF. Then, there are those who won’t use sunscreen with a high SPF because they think they won’t get a tan.
Here are the facts.
Higher SPF’s aren’t always necessary. You need to look at a couple of things when you are shopping for sunscreen. First, how light is your skin tone? Those with lighter skin will usually burn faster than those with darker or olive skin. If your skin starts to turn red fast, you’ll want a higher SPF.
But what does the SPF rating really mean?
SPF stands for Sun Protection Factor. To figure out how long you are safe from the sun (at least the UVB rays) you need to do a little math. Take the number of SPF and multiply it by 10. That is the time that if you were under perfect conditions, you’d be safe from the sun’s rays.
For example: SPF 20 x 10 = 200 minutes of sun protection.
Perfect conditions mean that you aren’t in water or sweating. Because you want to be safe from the sun, I’d recommend applying every 1-2 hours, no matter the SPF.
對於防曬，有不少誤區。很多人認為高SPF比低SPF防曬的效果更好。還有一些人認為自己不會曬黑，所以根本不需要高防曬指數的防曬霜。
然而事實並非如此。
高的防曬指數並非總是必需的。當你購買防曬霜時，你需要考慮以下幾點。首先，你的膚色如何？亮色皮膚的人較暗色或橄欖色肌膚的人更容易曬傷。如果你的肌膚很容易變紅，那你就需要高防曬指數的防曬霜。
但是防曬指數等級到底指的是什麼呢？
SPF是防曬係數的意思。需要計算一下才能知道你在太陽下可以待多久而不會被曬傷(至少不被UVB射線曬傷)。將SPF係數乘以10得出來的時間就是防曬產品的保護時間。