How Long Is Nicotine In Your System?

You may be wondering how long is Nicotine in your system? The answer is Nicotine stays in your system for about 14-21 days, however about 45 minutes after your last cigarette your brain will be nicotine free.  Some factors that determine how long nicotine stays in your system are how much you weigh, how physical you are as well as how much you smoked daily prior to quitting.