Heavy Metals Testing

Heavy metals testing is a laboratory analytical process—not an aroma or sensory characteristic. It measures concentrations of elements like lead, cadmium, arsenic, and mercury in cannabis plant material and final products. Regulatory frameworks in licensed markets typically mandate testing to ensure consumer safety, as heavy metals can accumulate in plant tissue depending on soil conditions, water sources, and cultivation practices. Testing results are expressed in parts per million (ppm) and compared against established safety thresholds set by state or regional authorities. This is a compliance and quality-control measure rather than a breeding or terpene-related trait.

Breeders and cultivators cannot directly select for lower heavy metal content through genetic traits alone; instead, growers manage accumulation through soil amendments, water quality, and cultivation protocols. Testing data informs production decisions but does not constitute a heritable phenotype.