Quote Originally Posted by ArtRollins
Nothing. It can only release it. What happens is that at around 178 degrees centigrade the THC laden trichromes that we all HOPE you still have on your buds will start to "vaporize." That is convert from a liquid to a gas. It is this gas we wish to inhale. It is even cool to note that as the temperature of the trichromes rise, different flavanoids are released up to 198 degrees. So the taste will change. Those first hits are like taking a hit on an unlit joint, so sweet.
I may have to disagree with you on this.

I forgot to notice it for citing purposes.

Surprisingly, the water pipes performed worse than the unfiltered joint, suggesting that "water filtration is actually counterproductive, apparently because water tends to absorb THC [tetrahydrocannabinol, the main psychoactive ingredient of marijuana] more readily than noxious tars." The vaporizer without the water pipe component did best, producing a cannabinoid/tar ratio "about 25 percent higher than the unfiltered joint." (An unexplained finding, though, was that the vapors from the vaporizer contained a higher than normal amount of cannabinol, a cannabinoid that is less psychoactive than THC but which may have medicinal benefits. The THC/tar ratio for the vaporizer was somewhat lower than the unfiltered joint.) Overall, Gieringer concluded that the study shows great potential for vaporizers but that "more developmental work needs to be done."