High Levels of Heavy Metals Detected in Marijuana Users' Bodies: Study

A study conducted at Columbia University Mailman School of Public Health found significant levels of metals, including lead and cadmium, in the blood and urine of marijuana users. The research suggests that marijuana may be an important and previously unrecognized source of metal exposure. The study, which analyzed data from over 7,000 participants, is one of the first to link self-reported marijuana use to internal measures of metal exposure. The findings highlight the need for further research and regulation to address public health concerns related to the growing number of cannabis users.