It's called The Omnivore's Dilemma, A Natural History of Four Meals, by Michael Pollan, and it purportedly examines four kinds of meals, in terms of production, origin of ingredients, delivery miles, etc.  The four meals are a McDonald's meal, a Whole Foods meal, a meal from a sustainable farm and a meal foraged from the wild.  

Pollan concludes that if we are what we eat, Americans are CORN. (Chicken McNuggets have 38 ingredients - 38! - and 13 of them are corn.)

Great, another book I want.

Karen in Austin

'tis strange I should be old and neither wise nor valiant. From "The Maid's Tragedy" by Beaumont & Fletcher

I did notice that most of the families don't have alcohol on display amid the groceries, or at least not much of it -- bottle of wine here or there.  The exception is the German family, which has four bottles of wine and 20 bottles of beer.  That family also has (I think) the highest weekly food expenditure.

(The Mexican family also had what might be beer bottles next to the sodas, but it's hard to tell for sure that's what they are.)