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Many people claim cannabis is a less risky choice than alcohol, but marijuana use has been much less studied, in part because it has only recently become a legal alternative to drinking and only in some locales. The studies that do exist show an increased risk of testicular cancer, and point to a possible link to oral cancers, head and neck cancers, and lung cancer.[1]
It’s thought that cannabis exposure disrupts normal hormone regulation and testicular function, leading to carcinogenesis. Additional study is required to fully understand this association, and to determine whether cannabis use has a causal relationship to any other cancers.
Until more study is undertaken, limiting use is the wisest choice. Cannabis can be addictive, and the proportion of THC–the primary chemical responsible for the drug’s perception-altering qualities–has increased significantly in recent years[2], which may increase the potential for adverse health effects.
If you’re trying to cut back, the following may help: