It can be easy to take for granted the fact that there isn’t formaldehyde in your milk.

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Sources:
http://www.slate.com/articles/health_and_science/medical_examiner/2011/03/bring_back_the_poison_squad.html
http://www.esquire.com/food-drink/food/a23169/poison-squad/
https://www.fda.gov/aboutfda/whatwedo/history/centennialoffda/harveyw.wiley/default.htm
http://www.americanheritage.com/content/doctor-wiley-and-his-poison-squad
http://www.purdue.edu/uns/html3month/2006/060814.Fair.Wiley.html
http://mentalfloss.com/article/92217/men-who-volunteered-be-poisoned-government
http://www.americanheritage.com/content/who-put-borax-dr-wiley%E2%80%99s-butter
http://www.acsh.org/news/2002/12/04/wileys-poison-squad
http://www.atlasobscura.com/articles/food-testing-in-1902-featured-a-tuxedoclad-poison-squad-eating-plates-of-acid
https://books.google.com/books?id=HItzboi4ePQC&pg=PA227
http://laphamsquarterly.org/food/death-pot
http://cen.acs.org/content/cen/articles/84/i38/Poison-SquadsTested-Chemical-Preservatives.html
https://transistor.prx.org/2015/03/the-poison-squad/
http://esq.h-cdn.co/assets/cm/15/06/54d3fdf754244_-_21_PoisonSquadFDA.pdf
https://books.google.com/books?id=zhwIDgAAQBAJ&pg=PA249#v=onepage&q=wiley&f=false
https://toxnet.nlm.nih.gov/cgi-bin/sis/search/a?dbs+hsdb:@[email protected]+328
http://articles.latimes.com/2011/sep/08/news/la-heb-skinnygirl-margarita-sodium-benzoate-20110908
https://www.fda.gov/aboutfda/whatwedo/history/default.htm

Images:
https://commons.wikimedia.org/wiki/File:Portrait_of_Dr._Harvey_W._Wiley.jpg
https://en.wikipedia.org/wiki/Formaldehyde
https://en.wikipedia.org/wiki/Borax