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A chemical found in some vape flavors has been linked to an irreversible condition called 'popcorn lung

Published by Business Insider on Thu, 15 Nov 2018


Some research suggests e-cigarette use may have troubling health effects, including a higher risk of heart attack.In 2015, one study found that some vape flavor packs contain a chemical that's been linked to a condition called "popcorn lung."It's a disease in which the airways become obstructed, and it once happened to a group of workers at a microwave popcorn factory.There's still no definitive evidence that vaping causes popcorn lung, but some experts have called for more research into the potential connection.As part of a push to minimize e-cigarette use among teens, Silicon Valley startup Juul announced on Tuesday that it would temporarily pull flavored e-cigarette pods from retail stores throughout the US."As of this morning, we stopped accepting retail orders for our Mango, Fruit, Creme, and Cucumber Juul pods to the over 90,000 retail stores that sell our product, including traditional tobacco retailers (e.g., convenience stores) and specialty vape shops," Juul CEO Kevin Burns said in a statement.The flavors will return to stores once they agree to adopt Juul's new age restrictions and a stronger system to ensure customers are at least 21, Business Insider reported.The move has been approved by many scientists and public-health experts amid growing concerns that e-cigarette flavors make the products especially appealing to young people."E-cigs have become an almost ubiquitousand dangeroustrend among teens," FDA Commissioner Scott Gottlieb said in a statement in September. "The disturbing and accelerating trajectory of use we're seeing in youth, and the resulting path to addiction, must end."Read more:Juul will soon stop selling flavored e-cigarette packs in retail stores, but a workaround could make the ban pointlessA pamphlet released by the US Surgeon General's office outlines a number of possible health risks tied to e-cigarette use. One of those possible risks, the pamphlet says, is exposure to a flavoring chemical called diacetyl, which has been linked to a condition called "popcorn lung."The scary-sounding disease was the subject of a flurry of online articles back in 2016, some of which claimed that e-cigarettes caused popcorn lung. But those claims were exaggerated, according to the publication Snopes, and some experts say we need more research on the potential relationship between vaping and popcorn lung.Here's what to know about the condition.'Popcorn lung' is a nickname for a condition called bronchiolitis obliteransBronchiolitis obliterans affects the bronchioles, which are the lung's smallest airways, according to the Genetic and Rare Diseases Information Center. In people who have the condition, the bronchioles can become inflamed and damaged, causing scarring that blocks the airways. The symptoms include coughing, shortness of breath, and fatigue or wheezing, even in the absence of a cold or asthma.The Centers for Disease Control and Prevention describes bronchiolitis obliterans as "a serious lung disease that is irreversible."It's known by the nickname popcorn lung because in 2000, the condition appeared in a group of workers who had worked at a microwave-popcorn factory where they had regularly inhaled artificial butter flavor. An investigation concluded that there was a link between the extent of the workers' airway damage and their exposure to diacetyl, a chemical used in artificial butter flavoring. (Afterward, many popcorn makers promised to phase out the chemical from their flavorings, the Associated Press reported in 2007.)One study found diacetyl in the vapor of flavored e-cigarettesMuch of the discussion surrounding a potential link between e-cigarettes and popcorn lung appears to trace back to a 2015 study published in the journal Environmental Health Perspectives.In the study, researchers tested the vapors of 51 flavored e-cigarettes and detected diacetyl in 39 of them.The study did not prove that vaping causes popcorn lung; it only showed that some flavored e-cigarette vapors contained this chemical. The authors of the paper wrote that their results indicated a need for more research."Because of the associations between diacetyl and bronchiolitis obliteransurgent action is recommended to further evaluate the extent of this new exposure to diacetyl and related flavoring compounds in e-cigarettes," they wrote.But this is still controversial. Some experts have pointed out that diacetyl is not unique to e-cigs. In fact, it is found in far greater levels in normal cigarette smoke, and normal smoking isn't considered a "major risk factor" for BO, according to Public Health England. Plus, not all e-cigs liquids necessarily contain the chemical. On its website, Juul says that it does not add diacetyl as a flavor ingredient in its manufacturing process. And in the UK, for example, diacetyl has been banned in e-cigarette liquid.Read more: The FDA is preparing to crack down on e-cigarettes like the Juulhere's why vaping is so dangerousRight now, according to the nonprofit Cancer Research UK, there's still "no good evidence" that vaping causes popcorn lung and there have been no reported cases of popcorn lung in e-cigarette users. A 2017 paper in the journal Toxicology also said that, so far, there are no reported cases of the condition from flavored e-cigarettes.But the authors of that paper also echoed the need for additional study in this area."Further research is needed to determine the short- and long-term health consequences of e-cigarettes including risk from diacetyl and similar flavoring constituents," they wrote.There are other reasons why vaping could be dangerousFor now, any potential link between popcorn lung and e-cigarettes remains unclear. But there are other ways that vaping could harm health.E-cigarettes do expose users to fewer harmful chemicals than burned cigarettes, according to the CDC, and much of the available evidence suggests vaping is somewhat healthier than breathing in burned tobacco, as Business Insider has reported. There is also some limited evidence that vaping may help people quit smoking regular cigarettes.But additional recent research suggests that vaping may have its own troubling health effects.In one study, researchers analyzed popular brands of e-cigarettes (not including Juul) and found some of the same toxic metals (like lead) in these devices that would normally be found in regular cigarettes, Business Insider reported. And in another study, scientists concluded that there was evidence linking daily vaping to a higher risk of having a heart attack.Most e-cigarettes also contain nicotine, the addictive chemical also found in cigarettes and other tobacco products. Nicotine can harm the developing teen brain, particularly the parts that control attention, learning, mood, and impulse control, according to the CDC.For now, the CDC says, using any tobacco product, including e-cigarettes, is "unsafe for young people."Visit INSIDER's homepage for more.This post has been updated to include the fact that diacetyl is found in higher levels in cigarette smoke than in e-cigarette liquid, that Juul says it does not add diacetyl as a flavor ingredient in its manufacturing process, and that diacetyl has been banned from e-cigarette liquids in the UK.Join the conversation about this storyNOW WATCH: Legal marijuana may have several health benefits
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