What are Heavy Metals?
Cannabis can pick up lead, mercury, cadmium, and arsenic from the ground or during processing. Foods that don’t break down heavy metals might accumulate in the body.
Heavy metals can harm the brain, kidneys, and liver and cause cancer. Medical cannabis users may be vulnerable.
While legal cannabis markets have strict testing regulations, metals can still be present at low levels. Consumers should check lab reports from producers when possible.
Signs of potential contamination include discoloration or an unusual taste or smell. Home growers should test their soil first.
Overall, the risk from heavy metals in state-regulated cannabis is small. However, increased awareness and testing can help eliminate their presence in marijuana products.