LET'S TALK BASICS: What's in cigarette smoke?
One main ingredient is nicotine, a colorless, poisonous substance used to kill insects. It is also the reason many smokers continue to smoke-nicotine is highly addictive. Another ingredient is tar, the harmful blackish residue from tobacco smoke. In total, there are over 4,000 toxins in cigarettes. This page is too short to list them all, so here are some highlights.
SEE THE HELPLINE FACT SHEET: What's in Cigarette Smoke?
