Today I stumbled upon a web site that uses gender and weight to allow you to accurately determine the _safe_ amount of tuna one can eat in a week.  About a year or so ago, I decided to let seafood into my diet on a very rare basis.  Otherwise I am a vegetarian.  One of the last things to let slip into the "seafood I'll eat" category was canned tuna.  I was at a sandwich shop and about the only thing I could find passable was this tuna sandwich they had.

The problem with tuna is heavy metals.  Specifically mercury.  It is really a problem with all seafood.  Mercury ends up in the water just about everywhere.  It is highly toxic.  Fish breath that water and soak up the mercury.  Then we eat them and deadliness ensues. 

Anyway, find out if you're getting too much tuna.  Chances are your delirium, hallucinations, and suicidal tendencies are probably from those magical cans of fish on the grocery store shelves!