Time since quitting
Beneficial health changes that take place
|20 minutes||Blood pressure and pulse rate return to normal.|
|8 hours||Oxygen levels return to normal. Carbon monoxide levels in blood drop to normal.|
|24 hours||Lungs start to clear out mucus and other smoking debris.
Chance of heart attack decreases.
|48 hours||Nerve endings start regrowing. Ability to taste and smell is greatly improved.|
|72 hours||Breathing becomes easier. Bronchial tubes begin to relax and energy levels increase.|
|2 – 12 weeks||Circulation improves. Walking becomes easier.|
|3 – 9 months||Coughs, wheezing, and breathing problems improve as lung function increases up to 30%.|
|1 year||Risk of a heart attack falls to about half that of a smoker.|
|10 years||Risk of lung cancer falls to that of a non-smoker.|
|15 years||Risk of heart attack falls to the same as someone who has never smoked.|