|Time after the last cigarette
||Blood pressure and pulse return to normal.
||Oxygen levels in the blood return to normal.
||Carbon monoxide is eliminated from the body. The lungs start to clear out the mucus.
||No nicotine is left in the body. Taste and smell improve.
||Breathing becomes easier as the airways open up. Energy level increases.
||Circulation improves making walking and running easier.
||Coughs and breathing problems improve as lung function improves by 90%.
||The risk of heart attack falls to about half that of a smoker.
||Risk of lung cancer falls to about half that of a smoker. Risk of heart attack is about the same as a lifetime non-smoker.