After 20 minutes
Circulation begins to improve in the hands and feet, says Len Horowitz, MD, a pulmonary specialist at Lenox Hill Hospital in New York City. Keep on with the smoking and circulation all over your body will suffer. Find out what helped ex-smokers finally quit.
After 2 hours
Pulse, heartbeat, and blood pressure may return to their pre-smoking baseline, Dr. Horovitz says. In the case of pregnant women: the heartbeat of the unborn child will also begin to return to normal. Try these 23 ways to stop smoking for good.
After 12 hours
Carbon monoxide in your blood returns to normal, according to the World Health Organization. Carbon monoxide is a poisonous, colorless and odorless gas found in high levels in cigarette smoke, among other things.