如果你上午10点涂上防晒指数为50的防晒霜,到中午的时候,“你可能还会受到防晒霜的保护,但它的防晒指数(50)已经不再准确了,”赞姆佩拉说道。
For full-fledged protection, use at least SPF 30
要得到充分的保护,你要使用防晒指数至少为30的防晒霜
That's what the American Academy of Dermatologists suggests.
这是美国皮肤科专家的建议。
SPF 30 also happens to be the dose that skin expert David Leffell keeps on hand for himself at home.
防晒指数30也恰好是皮肤科专家大卫·勒菲尔自己在家里使用的防晒霜剂量。
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.
对多数人而言,不论你在海滩上还是在高尔夫球场,这种程度的保护足够为你抵挡户外太阳光中波紫外线引起的96%的损害或晒伤。
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.
敏感皮肤以及肤色偏白的皮肤可以选择防晒指数为50的防晒霜来获得额外的保护,但勒菲尔表示,防晒指数高于50的防晒霜只能提供很少的额外效益。
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