A Penn State College of Medicine study suggests that these devices may help people decrease their dependence on combustible cigarettes which contain an array of harmful chemicals called toxicants without increasing their overall nicotine dependence
Droungas A, Ehrman RN, Childress AR, O'Brien CP (1995)
The definition of an adult differs from study to study, but most studies included people aged 15 and older
A Hong Kong Government Laboratory tar and nicotine report lists CHUNGHWA FTKS 20S SOFT PACK with 12 mg tar and 1.0 mg nicotine in that reported sample, but values can differ by market, regulation, and product version
Each type has its own strengths, so think about what fits your routine best before you buy
They work, plain and simple you can see all the tar in the filter but also my extreme coughing has stopped i just cough like a normal smoker, again (which was quite a relief, i can assure you)