Mackerel is a succulent fish rich in energy, protein and healthy fat, monounsaturated and polyunsaturated. Anyone who is a fan of canned fish has all this on the tip of their tongue. If you are not yet a fan, find out about one of the most used passwords: omega 3! One thing is certain: there is no mackerel without pure water, which is a guarantee before it reaches the can. And the processing is highly controlled, which is another guarantee once it comes out of the can.