How about none of: them? The reality is that the makers of these products have published NO results of any studies they have done, and because they have not been regulated, they don't have to. We do not know the safety of the oil used as a propellant when inhaled, or the flavorings, additives and preservatives when volatilized and inhaled. There is formaldehyde in the vapor, a carcinogen. So nobody really knows.
Answered 8/31/2014
3.8k views
4 doctors weighed in across 2 answers
A doctor has provided 1 answer
11 doctors weighed in across 3 answers
4 doctors weighed in across 2 answers
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question