It comes in a dazzling variety of flavors. But are they safe?
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In their study, upwards of 40% of flavor chemical was converted to new chemicals that enter the lungs, and these new chemicals are often not reported as ingredients on the package.
They may lead to lung irritation.
More studies are needed to understand the long-term effects of these chemicals on humans, but this may be another reason for you to put down that e-cigarette.