Warnings issued by big tobacco and big pharma about the dangers of propylene glycol are not grounded in scientific reality or backed by scientific research. After a study in mice at the University of Chicago’s Billings Hospital in 1942, it was thought that propylene glycol when inhaled might cause such diseases as pneumonia and other illnesses affecting the respiratory system. To determine long term effects followup studies on money and other animals were conducted. This larger study produced results that showed no ill effects from propylene glycol in the lungs.
The FDA and tobacco companies were quick to cry “danger’ and point to an ingredient that has been judged safe to use for many years. There is primary truth that is totally ignored in the warnings. We know smoking almost anything is safer than smoking tobacco.
In e-cigarettes propylene glycol is used to dilute the nicotine and provide a solution that can be vaporized and deliver nicotine to the e-smoker. PG is a commonly used food additive and is the substance used in fog machines. It also appears on the label of ingredients of many of the food products we routinely buy.
Warnings about propylene glycol are not coming from the scientific community, doctors, researchers, scientific journals or nutritionists. Searching online you’ll notice the warnings about PG appear on the blogs of anti-smoking groups, sites of conspiracy theorists and natural healing sites. On several blogs the dire warning of “you are breathing antifreeze” may point out those who flunked organic chemistry. The ethylene glycol in antifreeze is not the same thing.
A tremendous amount of information can be found on the internet but it’s important to know who you are listening to. PG is used in baby wipes and even the FDA is unlikely to approve a dangerous product for use on infants. The best electronic cigarettes deliver only a very small amount of PG to the e-smoker. Some e-liquids use glycerol rather than PG as a base but propylene glycol is the most used ingredient in e-liquid solutions.
Consumers are smart to closely examine ingredients in the products they eat or inhale. We have all become more educated about food additives that may cause problems even as they add healthy color. We know to check for a variety of terms when looking for low sugar product as sucrose, fructose and various “syrups” are alternate names for sugar.
The saccharin scare thirty years ago is a valuable example of the folly of acting on incomplete information and drawing incorrect conclusions. The FDA banned saccharine which was a very popular sweetener used as an additive in many packaged foods and. The FDA stated saccharin had caused cancer in mice and panic ensued. Companies lost a lot of money in changing the ingredients in their products and the public tossed out boxes of Sweet and Low which was a popular saccharin product.
What the FDA didn’t tell the public was that the research did not apply to people. The mice had been given huge doses of saccharin daily. Adjusting the amount to that needed for a person to develop cancer would require the person to consume at least 400 cans of diet cola every day for months. Today, saccharin is once again fully available for sale to the public.
Propylene glycol is a necessary ingredient for delivery of e-cig vapor. There is no evidence ths PG causes any danger to electronic smokers despite the efforts of tobacco companies worried about the competition.
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