The 12 Most Contaminated Fish to Avoid in the Supermarket

2. Atlantic salmon (farmed)

The majority of commercially available Atlantic salmon comes from aquacultures. Farmed salmon is often exposed to pesticides, antibiotics, and synthetic dyes to enhance its pink color. Tests have shown that farmed salmon contains higher concentrations of PCBs (polychlorinated biphenyls), which have been linked to cancer.

3. Swordfish:
The swordfish is a predatory fish, which means that it accumulates mercury from smaller fish that it eats. High levels of mercury can damage the nervous system, especially in children and pregnant women.

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