The immediate health benefits of quitting smoking are substantial.
Heart rate and blood pressure, which were abnormally high while smoking, begin to return to normal.
Within a few hours, the level of carbon monoxide in the blood begins to decline.
(Carbon monoxide, a colorless, odorless gas found in cigarette smoke, reduces the blood’s ability to carry oxygen.)
Within a few weeks, people who quit smoking have improved circulation, don’t produce as much phlegm, and don’t cough or wheeze as often. Within several months of quitting, people can expect significant improvements in lung function.