Eating two portions of fish per week linked to increased risk of skin cancer

Something is fishy here. Is canned tuna so important in the fish intake? Perhaps it is an issue in the canning rather than the fish itself?

Because of the fish or because they are full of heavy metals by now? You also shouldn't give small birds too much salad because it is too poisonous for them after conventional agriculture... Pregnant women should not eat more than two portions of tuna a week because of mercury. Tuna aren't born with mercury either...

Cannot read the article because of the paywall.