I have read that smoking tobacco heavily over time can exacerbate alcohol related brain damage. Does inhaling smoke on a regular basis age the brain in such a way that one may experience conditions such as dementia or parkinson's or other complications at an early age? Do the combustion chemicals in marijuana smoke deterioriate your brain slightly? I can live with the coughing but it scares me to think that my I am damaging my brain, even if it is only ever so slightly. I want to be sharp in my old age. Is my concern way off?