http://herb.co/2016/10/04/autoimmune-diseases/ Autoimmune Diseases: How Does Cannabis Help? How does cannabis treat autoimmune diseases? Is the herb really effective? Here's how cannabis reduces inflammation and calms down the immune system. It’s a misconception to think that cannabis simply provides a distraction from a serious illness. Compounds in the herb directly engage with immune cells, creating real and valuable changes in the body. More