I just finished reading Michael Pollan’s The Omnivore’s Dilemma and so far I’ve learned American’s are indeed Children of the Corn, Carbon-13 based life-forms, or walking corn chips. Maize has a special ability to absorb more carbon-13 isotope than other plants. Corn pervades our entire food chain from the high fructose corn syrup in our soft drinks to our corn-fed hamburgers.
Because of Corn’s ability to metabolize Carbon-13 it leaves an unmistakeable, mass-spectrometer fingerprint over our entire food chain in the US. Anyway, read the book. I will continue to remain an omnivore, though the book certainly explains why some people go vegan.