Earlier quoted context omitted.
Also, don't eat boxed foods or foods that went through multiple stages of processing. In Defense of Food by Michael Pollan spells it out very well, but I'll just give you my simple definition: Eating healthy is as close to eating dirt without actually eating dirt. Produce, grain, cheese, 1/2 pound to a pound of meat a week[1], and whatever else Marion Nestle recommends[1.5]. Just imagine what primitive man would eat.…
"Don't eat what your grandmother wouldn't recognize". is how I've heard it being summarized. :)
(Food diversity sucket in our grandparent's era. )