Dear Marilyn, 

Steve Macko published papers on stable carbon (and nitrogen) isotope 
analyses of amino acids in human hair to reveal diets. 
One of this is: 
Macko et al.: Documenting the diet in ancient human populations through 
stable isotope analysis of hair. Philos Trans R Soc Lond B Biol Sci. 1999 
January 29; 354(1379): 65-76. 

Apparently - as I just learned by an internet search - he is also appearing in 
the movie. 

Hope this helps. 
Cheers, Enno



On 22 Jan 2009 at 16:58, Marilyn Fogel wrote:

> 
> Dear Folks,
> I received this message from a colleague who is teaching students
> about the influence of corn. Do any of you alert readers have a
> reference at your fingertips that you could recommend for Charlie?
> 
> "Next Tuesday Washington College is hosting a viewing of the movie
> "King Corn," which is a critique of the use of corn products in our
> country (see description below).
> 
> One of the most fascinating things I heard about this issue was in one
> of your talks: The stable isotope evidence that Europeans coming to
> the US experience a shift in their carbon isotope ratios in response
> to the corn-heavy diet. Does that data appear in publication anywhere?
> I would love to bring that up at the viewing of this movie during the
> discussion period."
> 
> Marilyn Fogel
> 
> 
> Dr. Marilyn L. Fogel
> Geophysical Laboratory
> Carnegie Institution of Washington
> 5251 Broad Branch Rd., NW
> Washington, DC 20015
> Phone (202) 478-8981
> Main office (202) 478-8900