Preservatives and IQ scores

Claim made by: Trutherbot
Location: Twitter
Spotted on: 2013-03-26

One study of one-million students showed people who ate a lunch without preservatives or artificial dyes scored 14% higher on IQ tests.

More data:

http://www.nvcc.edu/home/rgreen/PowerWeb05/Intelligence%20The%20Surprising%20Truth.pdf

http://www.feingold.org/Research/BLUE/Page-11-NYschools.pdf

AFAICT, the actual publication is not online.

One of the authors was later involved in a similar study:

http://www.ncbi.nlm.nih.gov/pubmed/10706232

Update 2014-11-30

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