Americans were following their doctors' orders - as seen in this ERS report from the United States Department of Agriculture - and yet epidemics of type 2 diabetes and obesity went into full bloom.
The graph above shows the change in calories in the US since 1970 (tweeted by Nina Teicholz). As you can see people swapped healthy animal products for grains, vegetable oil, added sugars, fruit, vegetables and nuts. Exactly what the guidelines were suggesting.
In retrospect, maybe that wasn't such a good idea.
