Here's What Scientists Do—And Don't—Know About E

2020-02-27 04:08:28    阅读:810927

A little more than 3% of American adults regularly use e-cigarettes, and 15% say they have tried them, according to 2016 data from the Centers for Disease Control and Prevention (CDC). That means millions of Americans vape, either consistently or sporadically and theres evidence that the number is rising. As they become more prevalent, e-cigarettes which are typically used as alternatives to traditional cigarettes, or as smoking cessation aids are coming under increasing scrutiny from doctors and regulatory groups. Youth recreational use, in particular, has drawn the attention of lawmakers and public health experts, as trends like Juuling and dripping spread throughout schools across the country. Meanwhile, research parsing the health effects of e-cigarettes continues to accumulate. Heres what some of the latest studies say about the habit, and whats still unknown. The chemicals in e-cigs likely come with health risks While e-cigarette aerosol generally contains fewer harmful chemicals than smoke from burned tobacco products, according to the CDC, it still may pose some risks. Formulas vary, but many e

-cigarettes expose users to particles that can get into the lungs, potentially cancer-causing chemicals, heavy metals and other toxins, according to the CDC. A new study published in Scientific Reports also found that e-cigarette aerosol may contain more formaldehyde than previously estimated. Formaldehyde can be

carcinogenic at high levels of exposure, according to the Environmental Protection Agency (EPA). Related Stories 

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   E-cigs come in a wide variety of flavors, from strawberry to cre

me brle, and the chemicals used to flavor them have come under scrutiny. A 2016 study linked diacetyl

, a chemical often used in e-cig flavoring agents, to a serious respiratory condition nicknamed popcorn lung. The American Thoracic Society also recently released data from

human cell research that connects another common flavoring agent called cinnamaldehyde, which is used in cinnamon flavors, to lung damage. E-cigarettes may contribute to teen smoking E

-cigarettes cannot legally be sold to anyone under age 18, but that hasnt stopped teenage use from skyrocketing over the years. A 2015 study found that teenagers who smoke e-cigarettes may be more likely than their peers to also use other tobacco products, perhaps because the habit can contribute to nicotine addiction. Given that risk, the Food and Drug Administration (FDA) has made curtailing teenage e-cigarette use a priority, and has requested information from Juul and other e-cig manufacturers as part of that campaign. There is no acceptable number of children using tobacco products, said FDA Commissioner Scott Gottlieb in an April statement. These products should never be marketed to, sold to, or used by kids and we need to make every effort to prevent kids from getting hooked on nicotine. Its not clear whe

ther e-cigarettes help you quit smoking Lots of people turn to e-cigs as a bridge between conventional cigarettes and total smoking cessation, since they typically deliver nicotine and mimic the ritual of smoking. But more research is needed to determine whether or not thats actually an effective str

ategy. Some studies, including one published in The BMJ in 2017, have found that e-cigarettes may improve a smokers chances of quitting successfully, but others have found the opposite. For example, a study published in March in the Annals of Internal Medicine found that among smokers trying to quit, those who used e-cigarettes were actually more likely to use tobacco after six months, compared to non-users. Another study, published in the New England Journal of Medicine in May, found that cash incentives were mor

e effective at encouraging smokers to quit than free e-cigarettes. Get our Health Newsletter. Sign up to receive the latest health and science news, plus answers to wellness questions and expert tips.    Thank you! For your security, we've sent a confirmation email to

the address you entered. Click the link to confirm your subscription and begin receiving ou

r newsletters. If you don't get the confirmation within 10 minutes, please check your spam folder. Different smoking cessation strategies may work for different people, but currently, the data around vapings efficacy as a stop-smoking tool is murky. Write to Jamie Duc

harme at jamie.ducharme@time.com.

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