THC, Endo cannabinoid, medical cannabis, we are told weed is bad. Let me tell you that the cannabis plant is 50 million years old and is a natural substance that anyone can grow, so the big pharma companies can not patent it, although in the south of England GW Pharmaceuticals is growing weed and using it as a spray in Canada. Weed helps cancer I heard, and it helps me with my pain https://youtu.be/NjNykDugprs. There is a link to studies I found, it is interesting.