I never did learn enough about what is really in the cartridges so I'm sure that is the case. Since I haven't been much of a smoker I asked for the lowest nicotine ones they had as well. Guess I'm just not cut out for smoking. I smoked for 13-15 years and my body just seems to reject everything these days. Oh well.
That is one thing that I thought was really nice about blu too. A recharging pack seemed like a good idea and I thought it worked pretty well. As I puffed on the first one I started charging the second one in the pack. It says it can charge up to five batteries with one charge. Never got to test that out.