So the answer is if you are going to do alcohol, cigarettes or marijuana, marijuana is most likely the best for your body. People still ask, is marijuana harmful. Marijuana Might Provide Immediate Relief Consistent with numerous other studies, researchers report patients using medical cannabis reported improvements in health-related quality of life, which were mostly sustained over time. It has been made clear via research marijuana is better and easier on the body than alcohol. Photo by Cappi Thompson/Getty Images Medical Marijuana has been recognized as important to cancer, PTSD, epilepsy, HIV/AIDS and more.