The 12 Most Contaminated Fish to Avoid at the Grocery Store

4. With

Like swordfish, sharks contain dangerous levels of mercury and other toxins, such as arsenic. Regularly eating shark meat may increase the risk of heavy metal poisoning.

5. King mackerel

King mackerel is on the “do not eat” list of almost all health authorities due to its high mercury content. It is particularly dangerous for children, pregnant women, and nursing mothers.