8 hours Blood oxygen levels return to normal.
24 hours Carbon Monoxide has left your body
48 hours Sense of taste and smell begin to improve
72 hours Breathing becomes easier. Energy levels increase
5 days Nicotine addiction is no more
2-12 weeks Circulation starts to improve
3-9 months Coughing, shortness of breath and wheezing improve
1 year Risk of a heart attack falls to about half of a smoker
10 years Risk of lung cancer falls to about half of a smoker
After 15 years, the risk of heart attack falls to the same level as someone who has never smoked.