Those who smoke marijuana every day for ten years have been shown to have a 36% higher risk for testicular cancer. Overall, people have questioned the study because it draws data from other researchers. The lead researcher, Deborah Korenstein, of the Memorial Sloan Kettering Cancer Center has commented, saying “the fact is that we don’t know much about the impact of heavy use, use at a very young age, or about non-smoking use.”
Source: https://futurism.com