For years, opponents of cannabis reform have claimed that cannabis use lowers testosterone and harms male fertility. However, new research from Switzerland is challenging some of those assumptions. Researchers from the University of Geneva (UNIGE) and the Swiss Centre for Applied Human Toxicology analysed blood samples from 94 Swiss conscripts aged between 18 and 23 years old, including both cannabis users and non-users. The study found that young men who used cannabis had, o