- 相關(guān)推薦
關(guān)于曬傷的10個(gè)問(wèn)答「雙語(yǔ)」
夏天到了，來(lái)了解一些關(guān)于曬傷的知識(shí)吧。以下是小編帶來(lái)的關(guān)于曬傷的10個(gè)問(wèn)答，歡迎閱讀。
How does the sun burn skin?
While you bake in your lounge chair， ultraviolet light from the sun zaps through your skin and kills living cells that normally work to help make new skin. Ultraviolet A， UVA， can travel more deeply into the skin， but both UVA and UVB rays can burn skin.
Why does sunburned skin turn red?
To repair the damage and remove the dead cells， blood vessels expand and blood flow increases to the burned parts of your body. The extra blood turns your skin red and warm.
What causes sun-kissed skin to burn and itch?
Damaged cells send messages to your brain， signaling they’re injured and activating pain receptors， which makes your skin sensitive to touch
Why does skin tan?
In response to the UV rays frying your inner layer of skin， your body produces more melanin pigment that darkens the skin. The pigment absorbs the radiation and protects cells from damage. Most people don’t tan after just one day at the beach， or one session in the tanning bed， because it takes time to make melanin.
Why don’t redheads tan?
Melanin helps the body filter out UV radiation， but it also can be harmful. Pheomelanin， the type of melanin that makes red and blonde hair and fair skin， actually increases the risk for sun damage， such as sunburn and skin cancer.
How does sunscreen work?
The most effective sunscreens protect against both UVA and UVB rays. They work by either chemically absorbing UV rays or deflecting and bouncing them off your body.
Is SPF 30 twice as good as SPF 15?
Not quite. SPF tells you how long you have before you burn. Wearing SPF 2 lets you stay in the sun twice as long as without. An SPF 30 gives you 30 times your natural protection， and deflects 97 percent of the sun’s burning rays， whereas SPF 15 deflects 93 percent.
Why are we more likely to get sunburns on the beach?
The sun’s rays can reflect off of sand and water (snow， too). And there are other factors： UV is strongest in the summertime， at midday， at higher altitudes， and close to the equator. Even on a gray day， up to 80 percent of the sun’s rays can pass through clouds， mist， and fog.
A little redness never hurt anyone， right?
Wrong. Exposure to UV rays can mutate your cells and cause cancer. Blistering sunburns during childhood and adolescence increases your risk of developing skin cancer as an adult， because melanoma has more time to develop over your lifetime. Other nasty effects： wrinkled and leathery skin， brown sunspots， and cataracts.
What’s the best way to treat a burn?
It may take a day before you see the full rosy damage. Pop aspirin immediately?it may lessen early development of sunburn. Drink water. Treat first- and second-degree burns with cool baths， moisturizers such as aloe vera and hydrocortisone creams. See your doctor if burns accompany headache， chills， or fever.
1.為什么太陽(yáng)會(huì)曬傷皮膚?
當(dāng)你在躺椅里曬太陽(yáng)的時(shí)候，陽(yáng)光中的紫外線穿透你的皮膚，殺傷正常狀態(tài)下幫助你皮膚更新的活細(xì)胞。紫外線A，也就是長(zhǎng)波紫外線，穿透皮膚更深，不過(guò)紫外線A和B都能曬傷皮膚。
2.為什么太陽(yáng)曬過(guò)的皮膚會(huì)變紅?
為了修復(fù)損傷并清除死細(xì)胞，你的身體曬傷部位的血管會(huì)擴(kuò)張、血流量會(huì)增大。這種多于平常的血量讓你的皮膚發(fā)紅發(fā)熱。
3.為什么被曬傷的皮膚有灼痛感并且發(fā)癢?
受損細(xì)胞向你的大腦發(fā)出信息，傳遞受傷的信號(hào)并激活疼痛受體，使得你的皮膚對(duì)觸碰變得敏感。
4.為什么會(huì)曬黑?
作為對(duì)紫外線灼傷內(nèi)皮層的反應(yīng)，你的身體會(huì)產(chǎn)生更多的黑色素使皮膚顏色變深。黑色素可以吸收輻射，保護(hù)你的細(xì)胞不受損傷。不過(guò)大多數(shù)人只在沙灘上玩一天或者使用曬黑床一個(gè)周期不會(huì)曬成古銅色的皮膚，因?yàn)楹谏氐暮铣墒切枰獣r(shí)間的。
5.為什么紅頭發(fā)的人不適合曬黑?(外國(guó)人以古銅色皮膚為美，這是指那些故意的人說(shuō)的吧……)
黑色素可以幫助身體過(guò)濾紫外線，但它也有害處。紅發(fā)或者金發(fā)、白色皮膚的人體內(nèi)含有一種特殊的黑色素——褐黑素，它會(huì)增加被陽(yáng)光損傷的風(fēng)險(xiǎn)，比如曬傷和皮膚癌。
6.防曬霜是怎樣起作用的?
最有效的防曬霜既能防護(hù)紫外線A也能防護(hù)紫外線B。它們的工作原理要么是含有能吸收紫外線的化學(xué)物質(zhì)，要么是使紫外線折射或色散，避開(kāi)你的身體。
7.防曬指數(shù)(SPF)30的防曬霜效果比防曬指數(shù)15的好兩倍嗎?
其實(shí)并不是這樣的。防曬因子代表你能在陽(yáng)光下活動(dòng)多久而不被曬傷。涂上防曬因子為2的防曬霜能讓你在太陽(yáng)下安全的呆上什么都不涂的2倍時(shí)間。防曬因子30能讓你比只依賴你的天然防護(hù)系統(tǒng)多呆30倍的時(shí)間，也就是阻擋97%的紫外線，而防曬因子15則能阻擋93%。
8.為什么在海灘上更容易曬傷?
因?yàn)樯匙雍秃Ｋ梢苑瓷涮?yáng)光(雪也可以)。當(dāng)然還有其他原因：在夏天、正午、高海拔和靠近赤道的地方，紫外線特別強(qiáng)烈。甚至當(dāng)天看起來(lái)灰蒙蒙的時(shí)候，還是有80%的太陽(yáng)光可以透過(guò)云層、薄霧和濃霧照下來(lái)。
9.稍微曬紅一點(diǎn)不礙事的，對(duì)嗎?
不對(duì)。暴露在紫外光下會(huì)使你的細(xì)胞突變，引起癌癥。童年或者青少年時(shí)的曬傷會(huì)是你成年后患皮膚癌的風(fēng)險(xiǎn)增加，因?yàn)樵谀愕囊簧泻谏氐暮铣蓵r(shí)間增多了。其他令人討厭的結(jié)果還有皮膚起皺紋、變粗糙、長(zhǎng)褐斑，還有白內(nèi)障。
10.怎樣正確處理曬傷?
皮膚發(fā)紅可能要曬后一整天才能完全表現(xiàn)出來(lái)。立即吃阿司匹林，它可以幫助你在曬傷早期減輕它的發(fā)展。多喝水。對(duì)于一級(jí)和二級(jí)曬傷，用涼水沖洗，再抹上點(diǎn)保水的東西，比如蘆薈膠或者氫化可的松乳膏。如果你的曬傷還伴有頭痛、寒戰(zhàn)或者發(fā)燒癥狀，就趕快去看醫(yī)生。
五個(gè)護(hù)膚誤區(qū)
誤區(qū)1：所有護(hù)膚法都一樣
當(dāng)然啦，您在任何超市或藥妝店買到的一般潔面乳都能清除皮膚污垢和油脂，任何保濕劑也都能提供一定的保濕作用。但想真正看到正面的效果并使皮膚感覺(jué)最舒暢，產(chǎn)品中就需要真正含有皮膚所需要的成份。
采用個(gè)性化護(hù)膚法的第一步是了解您的皮膚類型。
毛孔小而粗糙，有皮屑嗎？那您的皮膚可能是干性。如果皮膚每天下午都會(huì)出現(xiàn)黑頭，并且需要吸油紙，那您的皮膚大概是油性。或者，如果您中午會(huì)看到T部位（額頭、鼻子和下巴）發(fā)亮，但臉頰周圍有皮屑，那您的皮膚可能是混合性。若您的皮膚往往容易過(guò)敏，那就是敏感性皮膚了。
無(wú)論您的皮膚是什么類型，請(qǐng)選擇支持重要的皮膚屏障健康的護(hù)膚方案，讓皮膚擁有最好的外觀和觸感。有保護(hù)作用的皮膚外層含有脂質(zhì)或水分屏障，可保護(hù)皮膚免受環(huán)境的影響并保持天然的濕度。當(dāng)皮膚屏障發(fā)揮最佳效果時(shí)，皮膚的外觀就會(huì)緊致豐滿，也會(huì)有一種天然的水嫩感。保持濕度屏障健康對(duì)于想要獲得的外觀是非常重要的。
個(gè)性化護(hù)膚方案可以像清潔和保濕這么簡(jiǎn)單，也可以像韓國(guó)13步程序一樣復(fù)雜。然而，不論您選擇了多少步驟，都要確保您護(hù)膚方案的每項(xiàng)產(chǎn)品都是適合您皮膚類型的。一般而言，護(hù)膚方案常見(jiàn)的主要產(chǎn)品如下：
1、潔面乳：請(qǐng)用早晚皆能使用的溫和潔面乳。若您有化妝，最好在洗臉前先另外采取一個(gè)卸妝的步驟—稱為兩步驟清潔。
2、爽膚水：這不僅對(duì)綜合型或油性皮膚的人是一個(gè)重要的步驟，爽膚也可以幫助滋潤(rùn)干燥的皮膚。此類產(chǎn)品近年來(lái)發(fā)展蓬勃，因此您可以找到含有從玫瑰水到康普茶等各種成份的爽膚水。洗臉之后立即使用爽膚水有助于鎖住皮膚的自然水分，準(zhǔn)備進(jìn)行皮膚滋潤(rùn)，但此步驟大多不是非做不可。
3、精華露：精華露亦稱為精華液或精華素，含有多種針對(duì)皮膚類型的成份，包括植物萃取物、油脂和營(yíng)養(yǎng)素。只需使用幾滴即可，因?yàn)檫@些產(chǎn)品是高濃縮的。
4、眼霜：當(dāng)您的皮膚正在吸收精華露時(shí)，溫和地用您的無(wú)名指將所選擇的眼霜或凝膠輕拍在眼窩周圍的皮膚。勿用力拍打或涂抹本產(chǎn)品，因?yàn)榭赡軐?dǎo)致細(xì)薄嬌嫩的皮膚受到拉扯。
5、保濕：保濕霜和精華露一樣，也要配合皮膚的需求。日間保濕霜可尋找廣譜防曬系數(shù)至少為SPF 30的產(chǎn)品，或于使用保濕霜之后再涂防曬霜。
誤區(qū)2：只有臉部需要護(hù)膚
記得我們上面討論的皮膚屏障嗎？它覆蓋并保護(hù)您全身的肌膚，這表示它其余的部分也像您臉上的皮膚那樣需要多加保養(yǎng)和關(guān)注。
為了照顧您嬌嫩的肌膚，并呵護(hù)那些經(jīng)常被忽視的身體部位，您應(yīng)該：
淋浴時(shí)水溫不要太熱，時(shí)間要短。長(zhǎng)時(shí)間接觸熱水會(huì)損害皮膚的保濕屏障，導(dǎo)致其干燥、發(fā)紅和刺激。
用毛巾拍干，勿用力擦拭。過(guò)度摩擦?xí)镀つw，進(jìn)而立即引發(fā)刺激，時(shí)間久了皮膚就會(huì)失去彈性。
每日進(jìn)行保濕，至少可以鎖住皮膚保濕屏障所需的水分。淋浴后可使用優(yōu)質(zhì)乳液，并于白天和夜間洗完臉之后使用臉部保濕霜。
每周做全身溫和去角質(zhì)一到兩次，特別集中在較粗糙的部位，像肘部、膝蓋、腳踝和腳跟。用菜瓜布沾保濕沐浴乳或保濕磨砂膏進(jìn)行去角質(zhì)。
保持水分。每日喝推薦的補(bǔ)水飲料64盎司，例如不加糖的茶、椰子水、杏仁奶，當(dāng)然啦！還有水。皮膚干燥可能是缺水的早期跡象。
避免使用刺激性或會(huì)使皮膚干燥的肥皂、潔面乳和沐浴乳。閱讀產(chǎn)品標(biāo)示，并避開(kāi)那些含有會(huì)破壞水分的硫酸鹽產(chǎn)品或刺激性的酒精產(chǎn)品。
每天都涂防曬霜。不僅是海灘假期和夏天才需要防御有害的陽(yáng)光，陽(yáng)光全年都會(huì)破壞皮膚的保濕屏障。我們下面會(huì)討論這個(gè)議題。
涂抹臉部護(hù)膚品時(shí)要一路抹到頸部，頸部需要的關(guān)注與臉部相似，而脖子上的皮膚甚至更薄。
請(qǐng)使用護(hù)手霜，特別是用有防曬系數(shù)的，以防止老人斑。雖然您可以假報(bào)您的年齡，但您的手可能會(huì)泄漏您的秘密。
別忘了腳部保養(yǎng)！淋浴時(shí)可使用浮石來(lái)磨掉老繭。如要額外進(jìn)行夜間保濕，可于雙腳涂抹乳液并穿上棉襪再上床睡覺(jué)。
誤區(qū)3：SPF越高，保護(hù)力越好
這個(gè)邏輯看起來(lái)好像很簡(jiǎn)單：防曬品的SPF系數(shù)越高，防曬效果越好。然而，實(shí)際情況卻有點(diǎn)復(fù)雜。
盡管UVA和UVB射線都會(huì)損傷皮膚，但SPF通常只測(cè)量該產(chǎn)品防止UVB射線的量，這種射線會(huì)導(dǎo)致最嚴(yán)重的曬傷。如果您使用某些高SPF的防曬霜，可能就不會(huì)看到皮膚發(fā)紅或發(fā)生曬傷，但這并不表示您沒(méi)有受到高劑量的有害UVA的照射。
甚至SPF系數(shù)本身也讓人迷惑。大多數(shù)人認(rèn)為SPF 30提供的防曬效果是SPF 15的兩倍，但實(shí)際上SPF 15的防曬霜阻擋了93%的UVB射線，而SPF 30產(chǎn)品則阻擋97%。
更復(fù)雜的是，SPF是將2毫克的防曬霜涂在一平方公分的皮膚上來(lái)測(cè)量的。但大多數(shù)人涂抹的量則是一半或更少。所以如果您只涂少量防曬霜，其保護(hù)力可能比您想象的要少得多。
那什么是最佳點(diǎn)？SPF在30和50之間的產(chǎn)品，就可以防止UVA和UVB輻射。通常產(chǎn)品會(huì)在卷標(biāo)上顯示為「廣譜」、「多光譜」、或「UVA / UVB光譜」。
想獲得最佳的防曬效果，抹防曬霜時(shí)，其用量應(yīng)比您認(rèn)為自己需要的更多。當(dāng)直接曝曬于陽(yáng)光下超過(guò)兩小時(shí)，或曾經(jīng)下水及運(yùn)動(dòng)過(guò)后，一定要重新涂抹。同時(shí)也要采取其他防曬措施，如尋找陰涼處、穿寬松的淺色防曬衣裳、戴帽子和減少在陽(yáng)光下曝曬的時(shí)間。
誤區(qū)4：美容覺(jué)其實(shí)只出現(xiàn)在童話故事中
即使星期六睡到中午也不會(huì)消除您的魚(yú)尾紋或法令紋。但越來(lái)越多的研究顯示，晚上有好的睡眠，長(zhǎng)期下來(lái)會(huì)讓您的皮膚有意想不到的效果。反之，睡眠不足會(huì)對(duì)皮膚造成極大的傷害。
一份針對(duì)英國(guó)女性的研究顯示了非常確鑿的結(jié)果。與每晚睡八小時(shí)的人相比，連續(xù)五天每晚只睡六小時(shí)的人的皺紋、黑眼圈和整體膚色暗沉都明顯增加了。
熬夜的直接影響會(huì)以黑眼圈的方式明顯呈現(xiàn)在浮腫的眼部。但失眠則會(huì)進(jìn)一步對(duì)皮膚的其他部分造成損害。
在睡眠當(dāng)中，您的身體會(huì)進(jìn)入修復(fù)模式。它忙著消除死亡的舊細(xì)胞，制造新細(xì)胞，并清理身體的毒素。如果短少一整夜的睡眠，您就會(huì)錯(cuò)過(guò)生產(chǎn)膠原蛋白的那幾個(gè)小時(shí)，這會(huì)導(dǎo)致皮膚松弛，看起來(lái)也會(huì)老得更快。此外您也無(wú)法獲得流向您臉部的正常血流量，而那是呈現(xiàn)健康的容顏所需要的。
睡眠不足還會(huì)使壓力激素皮質(zhì)醇的濃度增加，從而長(zhǎng)出青春痘。pH值不平衡和水分流失是失眠的常見(jiàn)副產(chǎn)品，會(huì)嚴(yán)重破壞您的膚色。
因此請(qǐng)?jiān)琰c(diǎn)就寢，以便每晚都能獲得建議的七至九小時(shí)睡眠。還有，別忘了護(hù)膚的基本原則：絕對(duì)不要在未卸妝的情況下睡覺(jué)。
誤區(qū)5：吃油膩的食物會(huì)長(zhǎng)青春痘
您可能從十幾歲就聽(tīng)過(guò)了：如果您大吃特吃巧克力、炸薯?xiàng)l或其他垃圾食品，您將很快就會(huì)長(zhǎng)出難看的青春痘。舊的邏輯是因?yàn)橛托云つw往往較容易出現(xiàn)瑕疵，因此吃油膩的食物會(huì)加重您皮膚出油的問(wèn)題。實(shí)際上，飲食中的油脂并不等于會(huì)產(chǎn)生更多皮脂（皮膚的天然油脂）。
盡管現(xiàn)在還不用跟快餐劃清界線，但吃什么仍然會(huì)影響您的皮膚。您吃什么就會(huì)成為什么，而某些食物確實(shí)會(huì)引發(fā)一些可能對(duì)皮膚外觀造成不良影響的荷爾蒙反應(yīng)，尤其是對(duì)食物過(guò)敏或敏感的人更是如此。研究顯示有些食物可能會(huì)讓有問(wèn)題的皮膚更加嚴(yán)重。如果這是您的情況，請(qǐng)盡量避免下列食物和飲料一段時(shí)間，看看您的皮膚問(wèn)題是否平息下來(lái)。
精制糖和加工谷物。單一碳水化合物已知會(huì)阻擾胰島素，造成負(fù)責(zé)皮膚細(xì)胞生長(zhǎng)和皮脂分泌的荷爾蒙的混亂。更多的細(xì)胞逆轉(zhuǎn)與更多的油脂可能就會(huì)給皮膚帶來(lái)災(zāi)難。
乳制品。青春痘通常與發(fā)炎有關(guān)，對(duì)有任何程度的過(guò)敏的人來(lái)說(shuō)，乳制品可能真的會(huì)有問(wèn)題。然而研究結(jié)果有些矛盾，因?yàn)榕Ｄ�、奶油和冰淇淋�?duì)皮膚的不良影響似乎較大，而酸奶和奶酪所引起的問(wèn)題較少。
酒精。您絕不會(huì)為此干杯的：酒精對(duì)皮膚來(lái)說(shuō)簡(jiǎn)直是一場(chǎng)噩夢(mèng)。它不僅會(huì)給肝臟（負(fù)責(zé)身體排毒的器官）帶來(lái)災(zāi)難，還會(huì)使身體和皮膚脫水。大多數(shù)雞尾酒都會(huì)添加大量的糖，這會(huì)導(dǎo)致可怕的胰島素阻擾。也許您認(rèn)為紅葡萄酒具有健康功效，所以可以是喝一些，但對(duì)許多人來(lái)說(shuō)，它還是有可能引發(fā)臉部潮紅。如果您想喝，盡量不要過(guò)度，并且要喝大量的水。隔天早上您的皮膚將會(huì)感謝您，而且會(huì)長(zhǎng)久感謝您。
事實(shí)證明，媽媽和祖母給您的一些關(guān)于護(hù)膚的建議并沒(méi)有科學(xué)或事實(shí)的根據(jù)。但好消息是，這護(hù)膚品的黃金時(shí)代提供了比以往更多的選項(xiàng)，讓您可以為您獨(dú)特的皮膚做最佳的選擇。
Myth 1: There is one right kind of skincare regimen.
Sure, most of the generic cleansers you can find at any supermarket or drugstore will remove dirt and oil from your skin. And any moisturizer will provide some boost in hydration. But to really see positive results and make your skin its happiest, you need to give it exactly what it needs.
The first step in adopting a bespoke (read: personalized)skincare regimenis to understand your skin type. Small pores with rough, flaky patches? You probably have dry skin. If you tend to get blackheads and need a blotting tissue every afternoon, you’re likely on the oily side of the spectrum. Or, you could be a combination of both if you see midday shine in your T-zone (forehead, nose, and chin) but are scaly around your cheeks. If you tend to be easily irritated, you could have sensitive skin. If you’re still unsure what category you fall into,take this skin type quiz to find out.
Whatever your skin type, choose a regimen that supports the health of your all-important skin barrier to help you look and feel your best. The protective outer layer of skin contains a lipid or moisture barrier that protects you from your environment and keeps natural moisture in. When your skin barrier is performing at its best, your skin looks firm and plump. It also has a natural dewy glow. Keeping your moisture barrier healthy is important to get the results you want to see in the mirror.
A bespoke skincare regimen can be as simple as cleansing and moisturizing or as robust as the Korean 13-step routine. However many steps you choose, make sure each product in your regimen is geared toward your skin type. In general, the following are common staple products of a skincare regimen:
1、Cleanser:Look for a mild cleanser to use morning and night. If you wear makeup, it’s best to remove it in a separate step prior to washing—called the two-step cleaning process.
2、Toner:It’s not just an important step only for those with combination or oily skin. Toning can also help moisturize dry skin. This category has boomed in recent years, and you can find toners that include a wide variety of ingredients, from rose water to kombucha. Toning right after cleansing helps lock in your natural hydration and prepares your skin for moisturizing, but this is the most optional step.
3、Serum:Also known as an essence or ampoule, serums may contain a broad range of ingredients—including plant extracts, oils and nutrients—that focus on types of skin concern. You only need a few drops, as these products are highly concentrated.
4、Eye cream:While your skin is absorbing the serum, use your ring finger to gently tap the eye cream or gel of your choice into the skin surrounding the eye socket. Don’t swipe or rub in the product, as that can cause pulling in an area with thin, delicate skin.
5、Moisturize:Like serums, moisturizers are also often tailored to your skin needs. For your daytime moisturizer, look for one with a broad spectrum SPF of at least 30, or apply a sunscreen separately after your moisturizer.
Myth 2: You only need skincare for your face.
That skin barrier we discussed above? It covers and protects the skin all over your body. That means the rest of it needs just as much care and attention as the skin on your face.
To baby the delicate skin you’re in and pamper those often-neglected body parts:
Take cooler, shorter showers. Prolonged exposure to heat can cause damage to your moisture barrier, which can lead to dryness, redness, and irritation.
Pat, don’t rub, yourself dry with a towel. Excessive rubbing can tug at your skin, which can cause immediate irritation and a loss of elasticity in the skin over time.
Moisturize daily, at minimum, to lock in the hydration your moisture barrier needs. Use a quality body lotion after showering, and use a facial moisturizer after cleansing both day and night.
Gently exfoliate all over once to twice a week, especially concentrating on the rougher spots like elbows, knees, ankles, and heels. Use a loofah with a creamy, hydrating body wash or a moisturizing sugar scrub.
Stay hydrated. Drink the daily recommended 64 ounces of hydrating beverages such as unsweetened teas, coconut water, almond milk, and, of course, water. Dry skin can be an early sign that you’re dehydrated.
Avoid harsh, drying soaps, facial cleansers, and body washes. Read the product labels and steer clear from those with moisture-sapping sulfates or harsh alcohols.
Apply sunscreen every day. Protection from the sun’s harmful rays aren’t just for beach days and summer months. The sun can break down your skin’s moisture barrier year-round. See more on this topic below.
Bring the skincare products you use on your face all the way down to the neck. It needs a similar amount of attention as your face, but the skin on the neck is even thinner.
Use hand cream, especially with SPF, to keep the age spots at bay. Even if you lie about your age, your hands could betray you.
Don’t forget your feet! Get rid of calluses by using a pumice stone in the shower. For extra overnight hydration, slather your feet with lotion and wear cotton socks to bed.
Myth 3: The higher the SPF, the better the protection
It seems like the logic should be simple: the higher the SPF number in a sunscreen product, the better itprotects against the sun’s harmful rays. The reality, however, is a bit more complicated.
Even though both UVA and UVB rays can damage the skin, SPF typically only measures the amount a product protects against UVB rays—the rays that cause the worst sunburns. If you used certain high-SPF sunscreens, you might not see skin redness or get a sunburn, but that doesn’t mean your skin hasn’t received a high dose of damaging UVA radiation.
Even the SPF numbers themselves can be deceiving. Most people believe that SPF 30 provides double the sun protection that SPF 15 does. In actuality, SPF 15 sunscreen blocks 93 percent of UVB rays, while an SPF 30 product blocks 97 percent.
Further complicating matters, SPF is tested by applying two milligrams of sunscreen to one square centimeter of skin. Most people apply half— or less —that amount. If you skimp on applying sunscreen, you could be much less protected than you assume.
So what’s the sweet spot? Look for an SPF between 30 and 50 that protects against both UVA and UVB radiation. This will often appear on product labels as “broad spectrum,” “multi spectrum,” or “UVA/UVB spectrum.”
For optimal sun protection, apply more sunscreen than you think you need. Be sure to reapply when exposed to direct sun for more than two hours or if you’ve been in the water or exercising. Also take other sun-avoiding measures like seeking shade, wearing loose, light-colored protective clothing, a hat, and limiting time spent in the sun.
Myth 4: Beauty sleep is real only in fairy tales.
Sleeping in until noon on Saturdays will not erase your crow’s feet or banish your smile lines. But a growing amount of research suggests consistently getting a good night’s sleep will do wonders for your skin long term. And, conversely, getting poor rest can have highly damaging effects on the skin.
A study of British women showed pretty conclusive results. All saw an increase of wrinkles, dark circles, and overall dull complexion after five consecutive days of getting only six hours of sleep per night—compared to after getting a night of eight hours of sleep.
The immediate effects of a rough night can be obvious in the form of dark circles under puffy eyes. But the damage sleep deprivation can cause the rest of your skin goes much further.
During sleep, your body goes into repair mode. It gets busy eliminating old, dead cells, making new ones, and cleaning your body of toxins. When you shortchange yourself of a full night’s sleep, you’re missing out on hours of collagen production, which can lead to your skin sagging and looking older sooner. You also won’t get the normal amount of blood flow to your face necessary to give you a healthy, rosy glow.
Lack of sleep also increases levels of the stress hormone cortisol, which can lead to breakouts. Imbalances in pH and loss of moisture are other common byproducts of sleep deprivation, and can wreak havoc on your complexion.
So go ahead and hit the sack a bit earlier to get the recommended seven to nine hours of sleep you need every night. And don’t forget the cardinal rule in skincare: never sleep without first removing your makeup.
Myth 5: Eating greasy foods will make you break out
You’ve probably heard this myth since you were a teenager: if you pig out on chocolate, French fries, or other junk foods, you’ll be promptly rewarded with an unsightly breakout. The old logic was that because oily skin tends to be more prone to imperfections, eating greasy foods will worsen your skin’s oil problems. In reality, oil in your diet doesn’t equate to higher production of sebum (your skin’s natural oil).
Don’t go throwing a parade through your nearest drive-thru just yet, though. What you eat still affects your skin. You are what you eat, and certain foods can trigger hormonal responses that may negatively affect how your skin looks. This is especially true for those that have food sensitivities or allergies. Research has shown that there are some foods that could aggravate problem-prone skin. If that describes you, try staying away from the foods and beverages listed below for a while to see if your skin troubles subside.
Refined sugars and processed grains. Simple carbohydrates are known to cause spikes in insulin, which messes with the hormones responsible for skin-cell growth and sebum production. More cell turnover combined with more oil can be a recipe for skin disaster.
Breakouts are typically connected to inflammation, and for people that have any level of sensitivity to it, dairy can really flare things up. While research is conflicted, milk, cream, and ice cream appear to have more negative impacts on the skin, while yogurt and hard cheeses tend to cause fewer issues.
You’re not going to want to toast to this: alcohol is a nightmare for the skin. Not only is it hard on the liver—the organ responsible for detoxifying your body—but it also dehydrates the body and the skin. Most cocktail mixers come with hefty added doses of sugar, which will cause the dreaded insulin spikes. And in case you thought red wine was exempt because of its noted health benefits, for a lot of people it can cause flushing of the face. If you’re going to imbibe, try not to go overboard, and drink plenty of water. Your skin will thank you the next morning—and in the long run.
It turns out that some of the advice your mother and grandmother gave you about skincare aren’t backed by science or reality. The good news is this golden age of skincare provides more options than ever to make the best choices possible for your unique skin.
【曬傷的10個(gè)問(wèn)答「雙語(yǔ)」】相關(guān)文章：
青春的傷詩(shī)歌11-28
傷優(yōu)秀作文02-22
小班音樂(lè)問(wèn)答歌教案06-10
分不清的傷歌詞07-23
醫(yī)傷鳥(niǎo)作文08-28
曬家風(fēng)作文12-03
曬童年作文12-27
與曬有關(guān)的作文12-19
曬家風(fēng)作文11-14