The importance of trace elements follow-up in Cannabis sativa L. varieties

The importance of trace elements analysis in cannabis flowers should be emphasized due to several reasons, encompassing health, quality and regulatory aspects. Although Cannabis sativa L. varieties have become largely included in the medicinal, cosmetic or food industry they should be employed with caution not only because of the cannabinoids, (THC which is considered for psychoactive compound), but also for their quality and toxicological aspects. Cannabis plants can absorb trace elements such as lead, mercury, cadmium, and arsenic from the soil, water, or fertilizers. These elements can be harmful or even toxic and should be taken as a serious threat to consumers. Some authors confirmed that a trace elements accumulation in Cannabis inflorescence, was mainly affected by the geographical origin but the botanical variety can also influence the potential for absorption of these elements in Cannabis. In this way we have investigated and compared the content of trace elements in six different varieties, grown in a green house in the same indoor conditions. The results have demonstrated that content of mercury and cadmium were highest in Jack Kush variety, and lead and arsenic concentration was most increased in Glueberry OG variety. Regular analysis ensures the maintenance of consistent quality across different varieties and/or batches of cannabis products. Therefore, identifying and mitigating contamination sources, such as soil, water, or agricultural inputs, from one side, and strict follow-up of trace elements content through in-door production quality control will ensure the purity of the final cannabis products.