Cigarette smoke contains 43 known carcinogens ... itself into the smoker's brain and very being? Here, follow the trail nicotine blazes through the body, from mouth to brain.

Cigarette smoke that lingers in cars, clothes and homes is just as dangerous as smoke coming directly from a cigarette or pipe, according to a new report. Experts warn that even if parents don't smoke ...

Cigarette smoke contains 43 known carcinogens ... itself into the smoker's brain and very being? Here, follow the trail nicotine blazes through the body, from mouth to brain.