Anyway he figured it is time to lose some weight and he was not much into cooking anyway, so he just filled a big tupperware every 2-3 days with sliced cucumbers and tuna from cans and that salad was the only thing he ate.
Eating tuna every day likely gives you more mercury than the European Food Safety Authority considers to be safe.
True but also depends on the type, I think the most popular type here is the skipjack tuna, which is classified as moderate mercury content.
My favorite is that people get credit for updating based on evidence.
The more common reaction is for people to get criticized (by themselves and others) for not having known the truth sooner.