For 21 patients with Crohn’s disease, nothing seemed to help. So researchers randomized them to either smoke two joints a day of marijuana or a look-alike placebo. The results? Ninety percent of those in the cannabis group got better, compared to only 40 percent in the placebo group. Shown below and at 3:11 in my video is a graph of their symptom scores. As you can see, there was no big change in the placebo group over the two-month study, but the cannabis group cut their symptoms by about half.
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