Certainly there are correlations between stress and obesity, and the stress hormones contribute to the problem. I think underlying that, again, is this issue around access and exposure and advertising and things like that. We have to keep in mind that our least nutritious foods, our most energy-dense foods, are the ones that are most available. It's that relationship between cost and energy density, cost and nutrition, that is the underlying driving force of why the exposure is so great and why the access to that kind of food is much greater than the access to healthy food.
A recent effort has been to not just rate the energy density of food, but to rate the nutritional quality of food by coming up with a simple index that actually gives the consumer an idea about how nutritious and how energy-dense the food is. It goes back to Ms. Keeper's comments about what's food. Well, healthy food has both nutrient content and low-energy density. We have to get people to understand that, but even understanding it won't solve the problem of access and exposure to advertising.