Cannabinoids have been proven to kill cancer tumor cells. The active components of marijuana, called cannabinoids, inhibit tumor growth in laboratory animals, and have also been proven to actually kill cancer cells. In fact, the US government has known this for over 30 years. In fact, cannabinoids have also been demonstrated to kill antibiotic resistant bacteria, like methicillin-resistant Staphylococcus aureus (MRSA), just as effectively as vancomycin and other powerful antibiotics.