Advocates of Medical Marijuana claim that, in the form of an extract administered orally or used as a topical salve, cannabis is a cure for cancer, as well as for a vast array of illnesses and diseases. They generally claim this cure has been suppressed by the pharmaceutical establishment and by governments around the world.
I am not informed enough to have an opinion on this matter. This clip is Part 1 of the Canadian documentary, "The Rick Simpson Story."
