8 hrs Nicotine and carbon monoxide levels in the blood reduce by half, oxygen levels return to normal. 24 hrs Carbon monoxide will be eliminated from the body. Lungs start to clear out mucus and other smoking debris. There is no nicotine left in the body. Ability to taste and smell is greatly improved.
Breathing becomes easier.
Bronchial tubes begin to relax and energy levels increase. 2-12 wks Circulation improves. 5 yrs Risk of heart attack falls to about half that of a smoker. 10 yrs Risk of lung cancer falls to about half that of a smoker. Risk of heart attack falls to the same as someone who has never smoked.