WolframAlpha is the web's most handy nutrition site

I'm no nutritionist, but there's no way a chicken has almost 700mg of sodium naturally occurring in 8 ounces of its breast. Not sure what WA is sourcing.

(Computerized nutrition advice taken with a grain of salt joke here...)

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Edit: it appears to be averaging results from the USDA NDB. http://www.nal.usda.gov/fnic/foodcomp/search/

That's actually pretty cool. Here's a PB&J: http://www.wolframalpha.com/input/?i=peanut+butter+%2B+jelly...