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The Healthiest Fish to Eat: A Complete Guide to Omega-3s and Mercury Levels

The Healthiest Fish to Eat: A Complete Guide to Omega-3s and Mercury Levels By Gladies Rajan - July 06, 2026
The healthiest Fish to Eat

Healthiest fish

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Fish to Limit Due to Mercury:

  • Shark, swordfish, king mackerel, tilefish: These are large, long-lived predatory fish that accumulate the most mercury; health guidelines generally recommend limiting or avoiding these, especially for pregnant women and young children. 
  • Bluefin tuna and other large tuna: Delicious, but higher in mercury than smaller fish, so best in moderation (canned light tuna is lower-mercury than albacore or bluefin). 

Rule of thumb: Smaller, shorter-lived fish (sardines, anchovies, herring, mackerel) tend to be the healthiest overall, high in omega-3s, low in mercury, and often more sustainable too. 

 

By Gladies Rajan - July 06, 2026

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