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Studies have shown significant improvements in vascular function, including measures such as flow mediated dilation and endothelial function, after switching from regular cigarettes to e-cigarettes (1)

We assess associations seen in the large NHANES database, some of which were observed previously (7), and postulate a potentially protective (or immunosuppressive) effect of carbon monoxide (CO) that might help explain the apparent inverse correlation between cigarette smoking and ANA

2 Many more irritate the lungs and airways

Even brief exposure can be harmful, especially for people with heart or breathing problems and for young children

These substances are associated with a number of health problems, including heart disease, cancer, and chronic respiratory diseases