MERCURY CONTENT
Big fatty fish tend to accumulate mercury which can have negative effects on vulnerable populations like pregnant women and young children. Best fatty fish choices are salmon, sardines, anchovies.
CANNED FISH
The most common canned fish are tuna, mackerel and sardines. Overall, they have acceptable nutritional value compared with the fresh fish. Try to pick the low salt options from the food markets since canned foods have usually high salt content!
DEEP-FROZEN FISH
Freezing fish is a method that promotes their long-term preservation. Of course, this method has some disadvantages, such as the easy oxidation of fatty acids in frozen fish, but fish that has been properly frozen can be of the same quality as fresh fish.
In this document you will find more grocery shopping tips!