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Dermatologists have been telling patients for years that using sunscreen regularly can protect skin against aging. Now there's research to back that up. 皮肤科医生多年来一直告诫患者，经常使用防晒霜能够防止皮肤老化。如今，这种说法有了研究证据的支持。 In a study published in the Annals of Internal Medicine, researchers showed that people instructed to apply sunscreen every day showed 24% less skin aging, as measured by lines and coarseness of the skin, than those told to use the cream as they usually do. 在《内科学年鉴》(Annals of Internal Medicine)上刊登的一篇论文中，研究人员指出，按指示每天涂抹防晒霜的人皮肤老化程度比被告知只是按照平时习惯使用防晒霜的人低24%。皮肤老化程度是以皮肤的皱纹和粗糙度来衡量的。 'This is great fodder for us to encourage people to use sunscreen, ' said Jeffrey Dover, a dermatologist in Chestnut Hill, Mass. 'I will quote this paper every day.' 马萨诸塞州切斯纳特希尔(Chestnut Hill)的皮肤科医生杰弗瑞•多弗(Jeffrey Dover)说：“这是我们鼓励大家使用防晒霜的绝佳依据。我每天都会引用这篇论文。” Sunscreen has long been touted as a way to stave off photoaging, or changes to the skin caused by sun exposure. But there wasn't hard evidence in humans to support the claim, study authors said. A trial published in 1995 involved 35 people with past skin cancer and found no evidence of sunscreen's protective effect, measured by looking at skin biopsies under a microscope. But larger, randomized trials open to the larger community hadn't been done, for logistical and cost reasons. | 
