The issue focused on research studies that found that medical marijuana could help prevent brain cancer. The studies — two published in medical journals and one study from Canada — found that medical marijuana may lower the risk of brain cancer and may even prevent or delay the appearance of cancer in some cases.

In one study, researchers found that medical marijuana use was associated with a 29 percent reduced risk of brain cancer. In another study, researchers found that medical marijuana use was associated with a 23 percent reduced risk of glioma,