Why are so many people overweight or obese? is it just poor food and lifestyle choices or is there more to it than that?

More to it indeed: Many who are obese eat a diet rich in foods with low nutrient density: high in sugars,starches,unhealthy fats and toxic additives, while more people are sedentary Our diets are often deficient in vitamins and minerals causing cravings so people eat larger amounts trying to get essential nutrients. Environmental toxins also play a role.For detailed info on other factors: http://tinyurl.com/j24797l

Societal obesity.: The high rate of obesity in American society is related to the pervasiveness of rich food options and sedentary lifestyles. As well, our portion sizes tend to be much larger than they should be. And, were a stressed out society, and stress contributes to an increase in adiposity. Then there's genetics, which play a role within families.