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How much tuna can you safely eat?

How much tuna can you safely eat? According to the FDA, up to 12 ounces of fish (two average meal portions), per week, is safe. More guidelines:

  • The FDA advises that pregnant women, nursing women and young children avoid shark, swordfish, king mackerel or tilefish, because they contain very high levels of mercury.
  • Fish that are low in mercury include shrimp, canned light tuna, salmon, pollock and catfish.
  • Albacore (white) tuna has more mercury than canned light tuna, so the FDA advises only 6 oz of albacore tuna per week and says that women of childbearing age and young children avoid albacore tuna entirely.
The Environmental Working Group's Tuna Calculator can tell a slightly different story though. Using the FDA's own scientific guidelines, EWG developed a calculator where you enter your weight and gender and see how much tuna is safe to eat.

Depending on your weight and gender, the safe amount can end be being much less than the 12 ounces. For example, for a 130 lb woman, the Tuna Calculator says 4.1 ounces of albacore tuna per week is safe. For light tuna, the calculator says 11.9 ounces of light tuna, or about two cans, is safe. Both of these calculations assume that no other seafood is eaten at all.

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