According to Dr. David Ludwig and many others endorsing the Low Fat Dietary Guidelines Caused Obesity Story (including Dr. Robert Lustig, journalists Gary Taubes and Nina Teicholz, and others), the Dietary Guidelines for Americans (1980) caused Americans to reduce fat consumption, increase carbohydrate to compensate for the reduction in fat, and become obese.
This occurred because, according to the story, carbohydrate is uniquely obesogenic: carbohydrate consumption is said to stimulate appetite and food intake. And, because carbohydrate consumptio increased as a result of the dietary guidelines, the dietary guidelines can therefore be said to have caused the obesity epidemic. The conclusion: if we change the dietary guidelines Americans will eat fewer carbohydrates, and the obesity epidemic will be solved; in short, to regain our health, we must to return to the Lost Lower Carbohydrate Dietary Guidelines Golden Age.
I believe that a substantial range of data demonstrate that this story is incorrect and not even plausible from the point of view of a well-informed human behavioral ecology. However, for the time being, I will focus simply on refuting a core claim, namely that in response to the Dietary Guidelines for Americans, fat consumption was drastically reduced. I will demonstrate here that this claim is directly contradicted by the available evidence, namely that released by the Centers for Disease Control and Prevention (CDC) and United States Department of Agriculture (USDA). I know of no available evidence that supports this core claim of the story.
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