I point you to a pop-culture-filled discussion on obesity over at designobserver.com. Obesity is an topical outpost for the site, which comments from a design perspective. Business reasons brought me, just in time, to two posts in recent days by design heavyweight (but very fit person) Jessica Helfand on the over/under nature of problem eating. 

She and her commenters are worth a look. (Well, I have to fold in a touch of humility: I commented both times, which I guess means I'm praising myself within the larger group.)