What is with all the conflicting info they bombard us with. The health pamphlet I got when pregnant with DD2 said the mercury levels (what the problem is with larger fish like swordfish, tuna, flake) is not a problem with tinned tuna because they use the smaller fish which have much lower levels in it. So I am the same as you - it is my main lunch staple - especially since we're not supposed to eat ham, processed meats or cold leftovers - are they trying to turn us into vegetarians? Probably not - because I recently read about being wary of fresh herbs and raw salad veggies. I need my tuna!!