But another article, from PLOS Medicine journal, tells that every 100 pounds over normal weight is as harmful as life of a heavy smoker. High stages of obesity (they start with BMI 40) can make life 14 years shorter by diabetes, cancer, heart diseases and other chronic illnesses that overweight prople suffer of. There was also a research of mortality rates among obese US citizens (today they take 6 % of all country’s population).

To finish: you already know that eating healthy, being sober and clean, doing sports are highly useful for expanding your life expectancy. Now you know how high exactly those chances are.