I used to hyperventilate and get bad reactions to it. I continued to smoke everyday almost throughout my treatment to the point of having no negative symptoms. I recently started to take breaks from it and noticed I healed maybe 10% more or so daily. It definitely sets you back some and suppresses the immune system. Additionally, it is damaging an organ, and candida thrives on damaged tissue. Smoking damages the heart and the brain as well, both are important for the body.