 So hemp plants are derived from the same species as marijuana, cannabis. But the difference between the two is that hemp usually has very low levels of the main psychoactive compound, THC. In many countries, hemp is marketed as also having health benefits. Now, some experts think that there might have been a lot more THC involved in these gummies than the manufacturers and consumers expected. All that vomiting and hallucinating, to me, sounds pretty much like someone that's taken a bit too much THC.