I don't trust the cigarette companies for anything and especially I don't want no "genetically engineered" shit. I'll take what nature gives me, thank-you. I never believed we have these specific cannibanoid receptors specifically for just cannibas. That makes no sense. True scientific research develops hypothesis based on results, but very often research is based on results to prove a hypothesis. Therefore I'm skeptical of any conclusions such as the small molecules getting into the brain. What? I suggest you take any so called "experts" with a grain of salt. Anybody and everybody can try to contribute to Wikipedia. They try to filter bullshit but that's kind of hard to do with so much floating around. Flame-on batman.