What Chemicals Are in Your Cigarette?

It's not just nicotine. You may be shocked to learn what else you're inhaling when you smoke.

woman pugging on a cigarette

Updated on March 1, 2024.

In addition to highly addictive nicotine, cigarette smoke contains over 4,000 chemicals. Here's what you're inhaling with each puff:

  • Arsenic (also found in rat poison)
  • Ammonia (a poison; present in many household cleaners)
  • Acetone (also found in fingernail-polish remover)
  • Benzene (also used as an industrial solvent and found in car exhaust)
  • Carbon monoxide (also found in car exhaust-pipe fumes)
  • Cadmium (used in rechargeable batteries)
  • Cyanide (a poison used in gas chambers)
  • DDT (an insecticide)
  • Formaldehyde (also found in embalming fluid)
  • Lead (a poison that's been removed from nearly all paints)
  • Mercury (a highly poisonous substance; easily absorbed through respiration)
  • Nickel (also poisonous; a known cancer-causing agent)
  • Hydrogen cyanide (a deadly poison used in gas chambers)
  • Hydrogen sulfide (sewer gas)
  • Polonium-210 (a radioactive substance)
  • More than 50 cancer-causing agents (carcinogens)

And, of course, nicotine, which isn't just addictive, it's a natural insecticide (it protects the tobacco plant from bugs). In its pure form, nicotine is a deadly poison. One drop could kill a human in minutes.

More On

Here's what happens to your body when you quit smoking

video

Here's what happens to your body when you quit smoking
If you smoke, the best thing you can do for your health is to quit.
Is Vaping Actually Better For You Than Smoking?

article

Is Vaping Actually Better For You Than Smoking?
E-cigarettes can leave carcinogens in your blood and may double your risk of heart attack.
5 Ways to Overcome Cigarette Cravings

slideshow

5 Ways to Overcome Cigarette Cravings
Quitting is hard, but not impossible.
How Can I Reduce the Risk of Vision Loss?

video

How Can I Reduce the Risk of Vision Loss?
The risk of vision loss later in life can be easily reduced, explains Mark Blumenkranz, MD, by simple living healthy. In this video, learn how weight ...
How Have We Done in Combatting Smoking?

video

How Have We Done in Combatting Smoking?
The cigarette smoking population has certainly shifted in recent years, but new developments in the industry concern experts. In this video, find out ...