Tuna and Swordfish
Tuna is constantly being exposed to mercury, so it will have severe negative effects on your health. Tuna is one of the most common sushi ingredients. However, scientists advise people to stay away from this fish. The demand for sushi is high, so it has been overfished and it is at a high risk of facing extinction. Tuna also contains high levels of mercury, so it is advisable to stay away from it completely. Studies show that over 80% of the tuna sold in the United States is gotten from destructive and unsustainable sources.
Swordfish also contains high levels of mercury. Therefore, pregnant women and children are advised to stay away from this type of fish. However, men on the other hand can eat it once a month. Swordfish are highly dangerous because they contain high levels of mercury.