Most physicians would agree... It is commonly accepted practice among them that any and all new "scientific" / medical evidence or findings are "Peer Reviewed" before they even begin to be accepted. They have seen too many examples of even legitimate scientists using legitimate science coming up with the wrong answers... And, then we get to the results obtained through intentional bias (such as to please the people funding the "study" -- but bias can take many forms...)...

I agree: caution -- and taking the broad view (and even then realizing that it can be wrong) is the best approach to nutrition.

p.s. I agree that the stuff coming out of the USDA has been filtered through multiple biases. Sort of a frankenstein monster developed by committee... It contains equal parts science, bias and corporate agendas... It's probably better than nothing -- but far from perfect.

But, it's a committee and they did their best. I wonder what I would have done if I had two scientists each giving me completely opposite answers based on equally valid science...