Originally Posted by Tarmac
At my old gym, there was a nutrition poster which listed how much moderation you should observe for many different kinds of foods. I remember what it said for tuna packed in water - no moderation necessary at all. Meaning it was so "non-harmful" that you could eat 2 cans a day for the rest of your life and have no predictable bad consequences. I was trying to think of other foods like this.
many vegetables, of course (but interestingly, not all)
That's an odd list... why is vinegar there? Who drinks pure vinegar? Mustard is hardly a superfood, and pickles (I hate pickles) might have a lot of sodium and could raise your body's pH levels.
You could probably live off a diet of eggs, carrots, brocolli and brussel sprouts forever - but why would you want to?
While it's more true for salmon and other fatty fish, eating two cans of tuna/day you might be exposing yourself to a lot of heavy metal.
Moderate everything... even water (see: Wee for a Wii).
Oh, and calories are calories... regardless of where they come from. Look at how fat cows, and pandas are... and they're vegitarians.