Neuroscientist Sandra Aamodt on why asking “Is it OK to be fat?” is the wrong question:
Compare [the news that the healthy obese are at a slightly increased risk] to the much larger risk increase for unfit or metabolically unhealthy people at any weight, reported in both papers. The relative risks ranged from 2.42 to 3.55, or roughly a threefold higher risk than healthy normal-weight people. So if obesity does present an independent risk, it’s about one-tenth as large as the risk associated with poor fitness or poor metabolic health.
What would a sensible society do with that information? Perhaps encourage everyone to concentrate on the risk factors that have a huge effect and are relatively controllable, by exercising and eating their veggies. Or worry about the many people who face a high risk of death because of unhealthy lifestyles but aren’t concerned because they’re thin.
What do we do instead? Ignore the first study and use the second to argue about whether it’s (sometimes) OK to be fat, with headlines like “Healthy Obesity is a Myth, Report Says” and “Overweight And Healthy: A Combo That Looks Too Good To Be True.” Sigh.