Quote Originally Posted by P.E.N.G.U.I.N.
the chemical doesn't have to be active for it to get absorbed into your bloodstream. if that were true then some important vitamins and minerals would never get absorbed. and your saliva/stomach acid aren't water based so it'll get taken out of the Marijuana plant and into your bloodstream eventually. Last but not least, heat isn't a factor. just because the THC is below the boiling point doesn't mean it can't be absorbed. what do you think happens when you use an ice bong?
Most of the fluids in your body are primarily water based, so a good deal of THC will get diffused before it is absorbed. You can get high off of a water based recipe, but it would take massive amounts of weed, and it totally wouldn't be worth it.

And heat is definitely a factor. THC will not get released until it is somewhere about 200F. You still heat the weed when using an ice bong. It has to be released at some point during the process.