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by tygorius 4905 days ago
I can't speak to salt, but the classic explanation for sugar and high fructose corn syrup is Robert Lustig's UCSF presentation[0]. Midway through he discusses the differences between HFCS and sugar in how they metabolized, including the brain aspects. (Hint: consider the long-term effects of alcohol up there.) Definitely worth the 90 minute investment of attention.

[0]http://www.youtube.com/watch?v=dBnniua6-oM