Junk food, cognition and the arrow of causation

10 Apr

A paper published in Physiology & Behavior suggests a junk food diet (defined as highly processed food)  cognitive impairment in rats. It is often argued that sedentary lifestyle and bad diet contribute to obesity. This paper presents evidence that sedentary lifestyle is an effect of bad diet. Here is a press release on the research:

“Overweight people often get stigmatized as lazy and lacking discipline,” Blaisdell said. “We interpret our results as suggesting that the idea commonly portrayed in the media that people become fat because they are lazy is wrong. Our data suggest that diet-induced obesity is a cause, rather than an effect, of laziness. Either the highly processed diet causes fatigue or the diet causes obesity, which causes fatigue.”


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