Thursday, January 22, 2015

We Lie About What We Eat, And It's Messing Up Science

How many peanuts did you snack on last week? If you don't remember, you're not alone. We humans are notoriously bad at remembering exactly what and how much we ate. And if there's one pattern to our errors, it's that we underestimate — unintentionally and otherwise. And yet, for decades, researchers who want to amass large quantities of data about how much Americans eat and exercise have had to rely on individuals to self-report this information. These self-reported data on diet and exercise have long been called flawed. But a paper published Tuesday in the International Journal of Obesity goes one step further. The authors, led by David Allison, director of the Nutrition Obesity Research Center at the University of Alabama at Birmingham, write, "[The data] are so poor as measures of actual [energy intake] and [physical activity energy expenditure] that they no longer have a justifiable place in scientific research." more

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