[mdchiefsfan]

• 8 weeks

Insulin resistance in smokers has normalized despite average weight gain of 2.7 kg (1997 study).

• 1 to 9 months

Any smoking related sinus congestion, fatigue or shortness of breath have decreased. Cilia have regrown in your lungs, thereby increasing their ability to handle mucus, keep your lungs clean and reduce infections. Your body's overall energy has increased.

• 1 year

Your excess risk of coronary heart disease, heart attack and stroke have dropped to less than half that of a smoker.

• 5 years

Your risk of a subarachnoid haemorrhage has declined to 59% of your risk while still smoking (2012 study). If a female ex-smoker, your risk of developing diabetes is now that of a non-smoker (2001 study).

• 5 to 15 years

Your risk of stroke has declined to that of a non-smoker.

• 10 years

Your risk of being diagnosed with lung cancer is between 30% and 50% of that for a continuing smoker (2005 study). Risk of death from lung cancer has declined by almost half if you were an average smoker (one pack per day). Risk of cancer of the mouth, throat, esophagus and pancreas have declined. Risk of developing diabetes for both men and women is now similar to that of a never-smoker (2001 study).

• 13 years

The average smoker able to live to age 75 has 5.8 fewer teeth than a non-smoker (1998 study). But by year 13 after quitting, your risk of smoking induced tooth loss has declined to that of a never-smoker (2006 study).

• 15 years

Your risk of coronary heart disease is now that of a person who has never smoked. Your risk of pancreatic cancer has declined to that of a never-smoker (2011 study - but note 2nd pancreatic making identical finding at 20 years).

• 20 years

Female excess risk of death from all smoking related causes, including lung disease and cancer, has now reduced to that of a never-smoker (2008 study). Risk of pancreatic cancer reduced to that of a never-smoker (2011 study).