Lead, pesticides and potentially harmful bacteria were among the contaminants found during an investigation into cannabis sold in semi-legal “coffee shops” in the Netherlands.
The research, which aimed to establish a “baseline” level of typical contamination, was carried out by the Netherlands Institute of Mental Health and Addiction (Trimbos Institute). It will be used to inform a trial starting in April in which shops in 10 municipalities will sell cannabis that is produced by licensed growers and subject to limits on contaminants.
