Some Cannabis/cannabis items can be contaminated with microorganisms, pesticides or other hazardous substances. Cannabis is to start with referred to in Hindu Vedas involving 2000 and 1400 BCE, from the Atharvaveda. Because of the tenth century CE, it's been instructed that it had been referred to by some in India https://maps.app.goo.gl/WmeWYb1ZMSfgp6qj6