The Food and Drug Administration (FDA) has classified propylene glycol as 'generally recognized as safe' (GRAS) for decades and is used in many of the most popular foods we eat every day
In addition to over 8 million human lives lost every year to the tobacco industry, we also lose 600 million trees, 200,000 hectares of land, and 22 billion tonnes of water, as well as 84 million tonnes of carbon dioxide being released into the atmosphere (source)
The variation in the removal yields ( y ) of tar and nicotine with respect to the mass of the sepiolite granules with a D of 0.10 mm is given in Fig
'I had a really cool men's group here that was really private and selective, so it was safe,' he explained
Pediatrics 123 , 12931300, doi:10.1542/peds.2008-0927 (2009)
"Whether it's in the throat, or the upper airways, or if it gets transported all the way down into the alveoli, that depends on the size of the particles and their other physical characteristics," he explained