Please take an hour of your time to watch this documentary, "Food Matters". It's important, relevant, and powerful, and I believe in everything they say with it.
A "New" Approach to Health from Jamie Simko on Vimeo.
Also, if you haven't read any of Michael Pollan's books ("The Omnivore's Dilemma", "In Defense of Food", etc), I would highly recommend you do so!
Educate yourselves - for your own health, your life, and the life of your children & grandchildren! :)