This New York Times article profiles one researcher that calls the obesity epidemic into question, suggesting that there are not necessarily more people who are obese. Rather the people who are obese are substantially heavier than they were in 1991, by 25 to 30 lbs. But the rest of the population remains pretty much the same.
Body weight, he says, is genetically determined, as tightly regulated as height. Genes control not only how much you eat but also the metabolic rate at which you burn food. When it comes to eating, free will is an illusion.
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