Additives have been used to facilitate manufacturing, increase shelf life, mask or reduce the harshness of smoke, impart flavour and aroma, and control burn mechanics, moisture content and nicotine delivery (see Section 12.6)
It is possible, even likely, pesticide contamination continues today
As smoking rates have declined in recent decades, so have rates of lung cancer, chronic obstructive pulmonary disease (COPD) and asthma
Harshness becomes clear early, and lighter draws reduce exposure
The FDA was given authority to regulate e-cigarettes and other vaping products in 2016, but it has not yet approved any device currently sold in the U.S
28 JUUL is now the most commonly sold e-cigarette product in the United States and is favored among youth