Well, if you are going to do the omega 3 conversation you have to include the grassfed meat thing, or at least not factory farmed meat thing, going with nuts as opposed to fish oil, etc.
Oils are damn important, and they really fucked everybody with the "cholesterol is bad, go with vegetable oil" They fucked that one up though, as a couple of the oils had healing properties, so they GMO'd em to hell.