Could it Take Longer?

I got to thinking that maybe it just takes longer to heal if you live in a more industrialized city or country. If you have been exposed to more chemicals, amalgms, polluntions, etc., maybe it would just take longer to pull all the crap out. I know it said it could take up to a year, but maybe some people need longer than that, depending on how long, and to what they have been,are exposed to. Just a thought!