A new study adding to the list of growing concerns that health experts have recently associated to smoking e-cigarettes.
According to researchers flavored e-cigarettes contain two chemicals that can impair breathing in smokers.
Around 90-percent of e-cigs contain flavoring agents that can cause bronchiolitis obliterans – a debilitating lung disease.
Those flavoring agents also can mutate gene expression, leading to damaged production and functioning in the cilia – which is what helps people breathe easily by clearing dirt and mucus away from the airway.
In December, the Surgeon General warned people are vaping at epidemic levels.
The study was published February 1 in Scientific Reports.