多久該洗一次澡

There's no such thing as showering too much, right? Wrong... Despite the practice that most people shower once or twice a day, we're only meant to shower once or twice a week. As gross as it sounds - according to experts humans daily showing is mainly for "aesthetic reasons."
沒有洗澡洗得太頻繁這種說法，對吧？那你可就錯了……儘管人們通常的做法是每天洗一次或兩次澡，但實際上我們應該每週只洗一兩次。雖然聽起來有點噁心--但根據專家所述，人類每天洗澡主要是因爲"愛美。"

Speaking to TIME, Dr. Elaine Larson, an infectious disease expert and associate dean for research at Columbia University School of Nursing argues: "People think they're showering for hygiene or to be cleaner, but bacteriologically, that's not the case. Bathing will remove odour if you're stinky or have been to the gym. But in terms of protecting you from illness, washing your hands regularly is probably adequate."
哥倫比亞大學護理學院的傳染病專家和研究副院長伊萊恩·拉森博士在接受《時代》雜誌的採訪時說道："人們認爲洗澡是爲了衛生，爲了更乾淨，但從細菌學角度來說，情況並不是這樣的。如果你聞起來臭哄哄的或是剛從健身房健身回來，那洗澡能去除你的臭味。但在保護你不生病方面，經常洗手就夠了。"

Turns out, the fancy soaps your buying are probably a waste of money too. Larson's research shows that antibacterial soaps and cleaning products aren't any better than a regular bar of soap when it comes to lowering your risk of getting infectious diseases.
事實表明，你買的昂貴的肥皂也可能只是浪費錢財。拉森的研究表明：在降低人們患感染性疾病的風險方面，抗菌皁和清潔產品並不比普通肥皂的效果更好。

The more you bathe, the thinner and less hydrated your skin becomes. Dry skin open up gaps for infection and causes germs to slip through. Washing can also strip your skin of its natural oils and may disrupt the immune system-supporting bacteria that live on your skin according to Dr. C. Brandon Mitchell, assistant professor of dermatology at George Washington University.
洗澡越頻繁，你的皮膚就會越薄，水分也就越少。乾燥的肌膚爲感染打開大門，從而導致細菌趁虛而入。洗澡也會去除肌膚的天然油，有可能破壞棲息於皮膚之上的支持免疫系統的細菌，喬治華盛頓大學皮膚科副教授C·布蘭登·米歇爾博士說道。

Both Mitchell and Larson recommend you don't use antibacterial soaps are particularly bad for stripping essential oils. Mitchell adds that: "Your body is naturally a well-oiled machine. A daily shower isn't necessary. The rest of your body doesn't need much soaping."
米歇爾和拉森都建議人們不要使用抗菌皁，因爲它們很容易去除人體的必需油脂。米歇爾補充說："你的身體是一個天然產油的機器。每天洗澡並非必要之舉。你身體的其它部位並不需要太多的肥皂。"

And when it comes to your hair, it's even less often. "Some people with a dry scalp and hair probably only need to lather it every few weeks. But even if you have dandruff or some other scalp issue that requires more frequent washing, a couple washes a week will suffice."
至於頭髮，那更不需要經常洗了。"那些髮質頭皮乾燥的人只需要每隔幾周洗一次就行了。但即使你有頭皮屑或其它的頭皮問題，需要經常洗頭，那也只需要每週洗幾次就行了。"

So, in terms of your health, you should probably only shower once or twice a week, in terms of how you look and smell might be a different story. A recent study showed that smelling bad was the biggest relationship deal-breaker.
所以，爲了健康，或許你每週只應該洗一兩次澡，但如果你想要看起來精神，聞起來芬芳，那就是另一回事了。最近的一項研究表明：難聞的味道是感情關係破裂的首要原因。