I took a university course about cannabis and bud tending. Lots to know and learn. Specific area I was fascinated by the most was how the human body has Cb1 and cb2 receptors and naturally produced endocannibinoids , phytocannibinoids comes from cannabis and other plants also like echinacea . Anandamine is an endocannibinoid that is very similar to thc. This leads me to believe that some people don't produce as much endocannibinoids which is why they need/seek phytocannibinoids to make up for.