Cannabis, also known as marijuana or hemp, is a genus of flowering plants with two main species: Indica and Sativa. Each has numerous genetic differences within the species. Cannabis plants produce oils which contain many different compounds, however, they are unique in that they are the only plant to produce cannabinoids. These cannabinoids interact with the human biological system called the Endocannabinoid system (ECS). The genetic makeup between different cannabis plants creates unique characteristics in the compounds that they produce, including the cannabinoid content. Each genetic difference has its own medicinal benefits when ingested.

Although there are hundreds of cannabinoids each interacting with the ECS in a different way, Cannabis is well known for its psychoactive traits coming from the cannabinoid THC.