Paul Campos criticizes the Obamas' new campaign against obesity:

First, numerous studies indicate that, just as with adults, improving children’s nutrition and activity levels is beneficial to their health, but usually produces little or no weight loss (which is all the more reason to focus on health rather than weight).

Nor are thin children in any less need of good food and healthy activities than fat ones. Indeed, over the past 20 years, extensive research has demonstrated that, when studies control for factors such as physical activity levels, weight simply ceases to have any meaningful correlation with health.

Second, a rich literature on stigmatization shows that the health costs of social stigma are high. I don’t believe Michelle Obama wants to stigmatize fat kids, but a campaign dedicated to eliminating them is guaranteed to do so in a profound way.

Amber's take here.