Varies: Carbon monoxide will be gone after 4 months when all of the red blood cells it covered are replaced by new ones. Nicotine will be gone within a few hours. Heavy metals with stay with you forever until you get chelation therapy to remove them--but for one cigarrette i would not bother. Other toxins as in pesticides may take other variable times to be expelled ; www.Medacpc.Com.
Answered 12/4/2011
6.2k views
Less than a day: The nicotine will be gone inside of a day and the tars will be cleaned up by the body's defenses in even less time than that. Don't go for a second cigarette!
Answered 4/5/2015
5.1k views
See below : The nicotine will be gone in six to twelve hours. Cotinine levels will be around longer.
Answered 3/3/2014
5.1k views
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