“Explaining the chemistry behind medical marijuana that got Sanjay Gupta and others to finally believe.”“Last week, CNN’s Dr. Sanjay Gupta  grabbed headlines for coming out in support of the validity of the medical use of marijuana, something he had opposed in the past. What changed his mind? …”Science”.
Here’s what he — and those studying the chemistry of marijuana — now understand.”

More: http://www.alternet.org/drugs/why-pot-makes-you-feel-good