"The idea supposedly is that the nicotine is heavier than the VG or PG and so it all stays in the lungs. This is also not true as we absorb only about 1/3 to 1/2 of the nicotine in the vapor, so the rest gets expelled."
One of the studies (sorry, don't have time to look for the link right now) on the composition of vapour both pre inhalation and as exhaled showed that only one percent of the nicotine in the vapour was left in the exhalant. It also notes that the majority of the nicotine is absorbed by the membranes in the mouth, nose and throat.
"the same flavors you may use in baking except more concentrated, with out the alcohol"
There may or may not be alcohol in the flavourings, but chemically Propylene Glycol itself is a double alcohol.
Propylene glycol - Wikipedia, the free encyclopedia
One of the studies (sorry, don't have time to look for the link right now) on the composition of vapour both pre inhalation and as exhaled showed that only one percent of the nicotine in the vapour was left in the exhalant. It also notes that the majority of the nicotine is absorbed by the membranes in the mouth, nose and throat.
"the same flavors you may use in baking except more concentrated, with out the alcohol"
There may or may not be alcohol in the flavourings, but chemically Propylene Glycol itself is a double alcohol.
Propylene glycol - Wikipedia, the free encyclopedia