While the FDA has classified both PG and VG as generally recognized as safe (GRAS) for oral consumption, the effects of repeated inhalation of aerosolized PG and VG are unclear
Kramer, Hanae Kurihara (2018) Original Inhabitants but Not First People: The Peculiar Case of the Bonin Islanders. Asia-Pacific Journal: Japan Focus 16(11)
However, the presence of additives means that you might be able to smell them while the charcoal is burning, or taste their residue on the meat
Smoking cigarettes can lead to cancer, stroke, heart disease, lung disease and so forth
As Scarsdale Smiles explained on their website in a since-deleted post, smoke particles linger in a smoker's lungs long after a person has finished smoking a cigarette, meaning bad breath also sticks around long after a person has taken their last puff