Fish out of water

Tuna — raw or canned — is a quick and good value source of protein.

Many of us buy canned tuna for its heart protective omega fatty acids but most of these are lost during the canning process when the tuna is steamed at a high temperature. We need to look elsewhere for our recommended two a week of oily fish.

Numerous reports about the mercury content of large fish, such as tuna, show that the quantity may be quite small. However, large fish tend to retain larger amounts of pollutants than smaller fish.