不同口味的蒸汽液或含有令人討厭的化學物質

We hear a lot about how the ingredients in vape juice might be bad for us: the nicotine is addictive, for example, and the flavorings could be bad for lungs. But new research says that there are chemicals in e-liquids that we didn't even know to worry about, because they form in the e-liquid bottle after all the ingredients are mixed together.

我們常聽別人說蒸汽果汁電子煙中的成分可能對人體有害：例如，尼古丁會讓人上癮，不同的口味可能對肺部有害。但新研究表明：我們甚至都不知道擔心蒸汽液中的化學物質，因爲所有成分混合在一起後，才形成了這種蒸汽液瓶。

Scientists have discovered that cinnamon, vanilla, and cherry flavors react with propylene glycol, a main ingredient in many vape juices, to create entirely new chemicals, according to a study published today in the journal Nicotine & Tobacco Research. Those same chemicals carry over into the vapor that people inhale, the new study says. Early investigations led by Sven-Eric Jordt, a professor of anesthesiology, pharmacology, and cancer biology at Duke University, suggest that these modified flavorings might be able to irritate lungs over the long term. And people don't even know they're inhaling them.

今日發表在《尼古丁與菸草研究》（Nicotine & Tobacco Research）雜誌的一項研究表明：科學家發現肉桂、香草和櫻桃口味會與丙二醇（大多數蒸汽果汁的主要成分）發生反應，產生全新的化學物質。這項新研究表明，人們吸入電子煙的同時，也在吸入這些化學物質。以杜克大學麻醉學、藥理學和癌症生物學教授斯文-艾裏克·諸林牽頭的早期研究表明，若長期抽電子煙，這些改良的調味劑或刺激肺部。而可悲的是，人們甚至都不知道吸入了這些物質。

There are more than 7,000 e-liquid flavors out there, and they're pretty controversial. Right now, regulators and lawmakers are weighing how to regulate them, and there's an ongoing debate about whether flavored e-liquids lure in kids or help adults switch away from cigarettes (or both). But there are also health impacts to consider: while the FDA says many of these flavors are safe for eating, we don't actually know if they're safe for breathing. Some research, for example, suggests cinnamon flavors can harm lung cells, The New York Times reports.

目前市場上大約有7000種電子煙口味，當然，這也引起了人們的爭議。目前，監管機構和立法者正在權衡如何對其進行監管；人們仍在爭論不同口味的蒸汽液是否會吸引兒童嘗試，是否能幫助成人戒菸（或兩者兼有）。但我們也要考慮其對健康的影響：雖然美國食品藥品監管局表示很多口味都是可以安全食用的，但我們並不知道吸入這些蒸汽液是否安全。例如，《紐約時報》報道，有些研究表明：肉桂口味的蒸汽液或對肺細胞造成損害。

And now, it turns out that there's more than just the flavor ingredients themselves to worry about: there are also the chemicals the flavorings can produce as they continue reacting in vape juice. That's why this study is important, says Robert Strongin, an organic chemist at Portland State University who was not involved in the research. It looks at the risks unique to the soup of chemicals in e-cigarettes. "There are things that are being vaped and inhaled that people don't really know about."

現在，事實證明：我們不僅需要擔心不同口味的成分，還要擔心其在蒸汽果汁中發生反應所產生的化學物質。因此這項研究十分重要，羅伯特·斯特龍金說道，他是波特蘭州立大學的有機化學家，並未參與這項研究。這項研究獨到的着眼於電子煙中化學物質的危害。"人們甚至不知道自己吸入了什麼。"