Here's some info on it:
http://www.webhealthcentre.com/gener...g.asp#benefits
After 20 min Blood Pressure & Pulse rate return to normal.
After 8 hrs Oxygen levels in the blood returns to normal. Chances of heart attack starts falling.
After 24 hrs Carbon monoxide is eliminated from the body. Lungs clear out mucus and other debris.
After 48 hrs Nicotine no longer detectable in the body. Ability to taste and smell is improved.
After 72 hrs Breathing becomes easier as bronchial tubes relax. Energy level increases.
After 2 - 21 weeks Circulation improves throughout the body.
After 3 - 9 months Breathing problems such as coughing, shortness of breath & wheezing decrease. Overall lung function increases by 5 - 10%
After 5 yrs Risk of heart attack falls to about half of that of a smoker.
After 10 yrs Risk of lung cancer falls to about half of that of a smoker. Risk of heart attack falls to about the same as non - smokers.