Here's a recent presentation by Tom Naughton (the maker of the Fat Head documentary I posted a while back). In it, he discusses how our dietary guidelines are fundamentally flawed, being based on horrible science.
Agree or not, I urge you to at least watch all 5 parts. You
will learn something, I guarantee
And here's an idea: Let's keep this thread flame-free if possible
And don't start pointless arguments by citing the AHA and organizations like that (you'll see why in the video).