In our study, we found that smokers are very likely to have taken up the habit before they turned 18, and those who did start early were more likely to be suffering with breathing problems, especially wheezing and phlegm, says Hedman in a release
Secondhand smoke inhaled by the bystanders is equally harmful
Since fully transparent materials expose the e-liquid to prolonged light exposure, any color changes or sedimentation become visible to consumers, requiring superior e-liquid stability
Check for smoke stains: Look for smoke stains on walls, ceilings, and furniture
Retrieved April 16, 2026
Zyn, and other products like it, are small pouches about the size of a stick of Trident gum that contain nicotine and other inactive ingredients within a permeable wrapper