If you aerosolize oil with high pressure air, it is chemically unchanged.Good point evan. The oil on its own is bad enough.
If you heat oil to temperatures around 200C in an e-cigarette, you are likely to break down the oil, and cause chemical reactions that would not occur at room temperature. You are likely to get an uncontrolled mixture of random chemical components, some of which are likely to enter the bloodstream.
Obviously there are still grey areas. For example, is it something else in the lifestyle of people who vape that is the underlying cause of the increased COPD risk? It seems likely that people who vape have chosen a lifestyle where they don't generally look after their health, so they may not go out jogging or eat enough vegetables etc. (Please read that last paragraph as something written by a person deluding themselves and not a scientist giving out unbiased advice).You’re right. Confounding variables/factors are the bugbear of most medical and ‘health’ research.
Typically is example of nut consumption linked to better health, but when you look deeper you find the people are more health aware, jog, eat 5+ a day, better informed, etc
So are you saying you “don't generally look after your health, so don't go out jogging or eat enough vegetables etc”
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