Some people are naturally skinny and able to eat almost anything they want without gaining weight. Obviously, there are also plenty of folks who need to watch their diets very carefully and exercise regularly to prevent unhealthy weight gain. The causes for obesity are not well understood, and while many observers like to say it's obvious that people need to expend more calories than they consume, the challenge of doing so isn't as simple as it sounds for many. There aren't any miracle diets or drugs
, but as we study obesity and understand it more, there could be more palatable treatments someday.
If you'd like to read more awesome and interesting stuff, check out this unrelated (but not entirely random!) Techdirt post