http://en.wikipedia.org/wiki/Sodium#Biological_roleInteresting. Although further up the page it clearly establishes pure sodium as being quick to oxidize and reacting violently with water. And given that our body has a significant water content....
From this article the one thing I'm not getting from it is that sodium is transported in its raw, unstable form. One moment they're talking sodium ions, the next moment they're talking sodium chloride.
Anyway Pedonbio, if you're planning on snacking on some pure sodium, could you get someone to put the event on YouTube?

Me, I'll be over here, hiding behind the blast shield.