If you quit smoking right now...
Within 20 minutes: Your heart rate and blood pressure drop.
Within 12 hours: The carbon monoxide level in your blood drops to normal.
Within 3 months: Your circulation and lung function improves.
Within 9 months: You will cough less and breathe easier.
After 1 year: Your risk of coronary heart disease is cut in half.
After 5 years: Your risk of cancer of the mouth, throat, esophagus, and bladder are cut in half. Your risk of cervical cancer and stroke return to normal after 5 years.
After 10 years: You are half as likely to die from lung cancer. Your risk of larynx or pancreatic cancer decreases.
After 15 years: Your risk of coronary heart disease is the same as a non-smoker’s.