Thereisapopularmisconceptionthatit'ssomehownormaltoburnyourskinbeforeitfadesintoagorgeouscaramelcolour.Unfortunately,thismisinformationwon'tjustleaveyouinneedofsomeaftersunlotion-itcouldturnouttobedeadly.Burningyourskincertainlyisn'taprerequisiteforgettingtanned,butitwillsignificantlyincreasetheriskofdevelopingskincancer.AccordingtotheInsituteofCancerResearch,morethantwopeopleundertheageof35arediagnosedwithmalignantmelanomaeachday.It'sbesttotangradually,sostayoutofthesunduringthehottestpartoftheday(between11amand3pm),applysunscreenregularlyandcoverupsensitiveareaswithhats,sunglassesandotherclothing.有一个受欢迎的误解，在皮肤变成酱色之前无论怎样晒你的皮肤都是正常的。不幸的是，这些错误的信息不仅会使你急需一些晒后的护肤液-它可能会是致命的。晒皮肤确实不是晒伤的先决条件，但毫无疑问这增加了患皮肤癌的风险。根据癌症调查协会，每天会有超过两个35岁以下的人被诊断为恶性肿瘤。最好是逐渐地晒皮肤，因此在一天中最热的时候（在中午11点到下午3点之间）远离太阳，有规律的使用防晒霜，用帽子，太阳镜和其它的衣服遮住敏感的地方。Manypeoplestillmaintainthatgoinginandoutofair-conditionedbuildingscanmakeapersonsick.Inreality,expertssaythatit'sextremelyunlikelythatfluctuatingbetweenhotandcoldairinthiswaywilldamageyourhealth.Aswithcoldsandotherrespiratoryailmentscontractedinthewintertime,coldairitselfisnottheculprit—virusesare,explainsDrUjwalaKaza,anallergistandimmunologistatNewYorkUniversityLangoneMedicalCenter.Soifyoufindthatyoustarttosnifflethemomentyouwalkinoroutofanair-conditionedbuilding,thenchancesareit'sdowntosummerallergies.许多人坚持认为出出进进有空调的建筑物会使人感冒。事实上，专家认为以这种方式，冷热之间不规律的气流极其不可能损害你的健康。在冬天，染上感冒和其它呼吸疾病，冷空气并不是罪魁祸首-病毒才是真正的元凶，纽约大学郎格涅医药中心的变应症专科医师和免疫学家UjwalaKaza博士解释到。因此当你觉得走进或走出有空调的建筑物时开始打喷嚏，那可能是由于夏季的过敏反应。Whilethebronzedlookmakesusthinkwelookhealthier,thetruthisthattoomuchsuncanactuallyhavetheoppositeeffectonyourwellbeing.WeneedthevitaminDinsunlighttokeepourbonesstrong,butaccordingtotheWorldHealthOrganisation,overexposuretoUVrayscansuppressthebody'simmunesystemandleaveusmorevulnerabletoinfectionsanddisease.Aswellasloweringyourbody'snaturaldefences,toomuchsunlightalsobreaksbloodvesselsandovertimemakestheskinlookandfeelroughandleatheryandcanevencausewrinkles.It'stemptingtosoakupthesunwhenyou'reyoungandit'shardertoseethedamageit'sdoingtoyourskin,butgoingbrownisyourskin'swayofshowingyouitisdamaged,soit'salwayshealthiertofakeit.尽管青铜色皮肤使我们觉得看起来更健康，真相是太多的阳光会起反作用对于人类。我们需要阳光中的维他命D保持骨骼的强健，但是根据世界健康组织，过多的暴露在阳光下会降低身体免疫系统的功能，使我们更易被传染以致于生病。同样，降低身体天然的防御系统，太多的太阳光也会破坏血管，时间达到一定程度会使皮肤看起来和感到粗糙，坚韧，甚至可能引起皱纹。尝试年轻时沐浴阳光更难显现对皮肤的坏处，但是皮肤变成棕色表明它被损坏了，因此仿造它更健康。Ifyouhaveolive-colouredskinthenyoumightnotburnaseasilyinthesun,butyouarejustaspronetothenumberonecauseofprematureageing-sundamage.Therulesofsuncarestillapplytoyou,eventhoughyoumightbeabletogetawaywithalowerSPFthansomeofyourpale-skinnedfriends.Toavoidlookinglikeaprune'shandbagwellbeforeyourtime,keepapplyingsunscreenatregularintervalsanduseahigherSPFonyourfacetoprotectitssofterskin.如果你拥有橄榄色的皮肤，那么你...