Mercury & Contaminants in Seafood

Omega 3 FishAs we mentioned in a previous post, Omega-3 Fatty Acids in your diet are critical for a healthy body & mind.  But, you want to make sure to avoid eating seafood with high levels of mercury (to be specific – methylmercury).  Fish that are large and with longer life spans can have a high concentration of methylmercury that exceeds the US limit of 1.0 ppm (parts per million).  The limit in Canada is only 0.5 ppm.  Predatory fish, such as shark, swordfish, tuna, and marlin, feed on smaller fish and over time accumulate higher levels of methylmercury.  Mercury levels in the oceans are rising at an eye-opening rate (almost 30% in just 10-15 years).  Without immediate reduction in industrial pollution worldwide, mercury and contaminant levels in our seafood will become a growing concern and threat to our health.

Whether you are looking to improve your diet or are searching for a safe Omega-3 supplement, be sure to consider the source.  It is especially important for women who are pregnant, trying to get pregnant, or nursing and young children to avoid fish with potentially high methylmercury levels.  Below are lists of fish that are considered a low mercury risk and of fish to limit or avoid.

Low Mercury Risk Fish – Best Choices:

  • Pacific Halibut
  • Alaska Wild Salmon
  • Tilapia
  • Rainbow Trout
  • Oysters (farmed)
  • Mussels (farmed)
  • Dungeness & Stone Crab
  • Catfish (US farmed)
  • Arctic Char (farmed)

High Mercury Risk Fish – Avoid or Limit Consumption:

  • Blue, King, & Snow Crab (US)
  • Oysters (wild)
  • Swordfish
  • Canned Tuna
  • Chilean Seabass (Toothfish)
  • Grouper
  • Blue & Striped Marlin
  • Orange Roughy
  • Salmon (Atlantic, farmed)
  • Shark
  • Sturgeon
  • Albacore, Bigeye, Yellowfin, & Bluefin Tuna

If you are looking for an Omega-3 supplement, we recommend Nutri-West Complete.  While we didn’t include everything on the lists, let us know if you have a question about a specific fish & we’ll try to provide an answer!

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2 Responses so far »

  1. 1

    Good and informative blog. Mercury poisoning poses a huge threat since the effects of poisoning are so detrimental yet the FDA regulations are so lax. Safe Harbor Foods offers a certification now in certain grocers allowing consumers to buy fish with confidence knowing they’ve met a stricter mercury concentration criteria, not based on a universal limit, but based on the species. The list is posted here on their website: http://www.safeharborfoods.com/mercury-testing-standards/

  2. 2

    powderhoundmktg said,

    Thanks for the additional information, Chelsea! You are absolutely right and we all need to be more aware of what we’re putting into our bodies these days.


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