A recent study has shown that vaporizing cannabis delivers more THC to the bloodstream than smoking.

Subjects who vaporized weed had significantly higher amounts of THC in their blood compared to those who smoked an equal dose. Results from the impairment questionnaire also showed increased effects, as those who vaporized not only self-reported more side effects like dry eyes or mouth but also made twice as many mistakes on cognitive tests.

See the original article from Ganjapreneur