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The "Got Mercury?" website (sponsored by Turtle Island Restoration Network, a non-profit organization) includes a calculator for determining mercury levels in fish. [58] Species with characteristically low levels of mercury include shrimp, tilapia, salmon, pollock, and catfish (FDA March 2004).
The types of fish to eat are categorized based on the mercury levels found in fish and the risk to human health. Mercury regulation in the United States limit the maximum concentrations of mercury (Hg) that is permitted in air, water, soil, food and drugs.
Studies of accumulated mercury levels find average mercury concentrations from 0.1 ppm, [30]: 15 0.2 ppm, [31] and up to 0.4 ppm. [32] The US Food and Drug Administration puts sablefish in the "Good Choices" category in their guide for pregnant women and parents, and recommends one 4-ounce serving (uncooked) a week for an adult, less for children.
“Some of this concern is valid, given that most of the methylmercury in our bodies comes from eating seafood, and that mercury levels in seafood appear to be on the rise,” says Kim Yawitz, R.D ...
The concentration of mercury in any given fish depends on the species of fish, the age and size of the fish and the type of water body in which it is found. [24] In general, fish-eating fish such as shark , swordfish , marlin , larger species of tuna , walleye , largemouth bass , and northern pike , have higher levels of methylmercury than ...
However, fish and shellfish containing higher levels of mercury may be harmful to an unborn baby or young child, per the FDA, which is why it's advised that pregnant women and children eat fish ...
However, at higher levels, mercury can be toxic to adults or harmful to pregnant women and young children. The degree of mercury exposure depends on the amount and type of fish eaten, per the ...
Health alerts for fish with high levels of contaminants (e.g. mercury, dioxins, PCBs) are also noted, although they may appear in any category. The Seafood Watch website includes regional, country-wide, and sushi guides for the United States. Pocket guides are available from the aquarium and further information is on the web site.