4. Sharks
: Similar to swordfish, sharks contain dangerous levels of mercury and other toxins such as arsenic. Regular consumption of shark meat can increase the risk of heavy metal poisoning.
5. King Mackerel
King mackerel is on the prohibited fish list of almost all health authorities due to its high mercury content. It is especially dangerous for children, pregnant women, and nursing mothers.
6. Tilefish (Gulf of Mexico)
Gulf of Mexico tilefish is among the fish most contaminated with mercury. It is often recommended to avoid it completely, especially if you have a health sensitivities.
7. Imported Catfish:
Much of the catfish sold in supermarkets is imported from countries with lax food safety regulations. These fish are sometimes treated with antibiotics that are banned in the US and may contain contaminants from polluted water.
8. Chilean Sea Bass
Chilean sea bass is known for its buttery texture, but also notorious for its mercury content. It is overfished, and much of the sea bass on the market is caught illegally or mislabeled.
9. Bluefin Tuna
Bluefin tuna is endangered but still found in luxury markets. It contains extremely high levels of mercury, making it a poor health choice despite its popularity.
10. Eel (Unagi)
Eels, especially freshwater eels, absorb pollutants from their environment. Studies have found high concentrations of PCBs and flame retardants in eel flesh.
11. Orange Roughhead
Orange roughy can live up to 150 years and therefore has more time to accumulate mercury and other toxins in its body. This deep-sea fish is threatened with extinction due to overfishing.
12. Grouper:
Groupers are susceptible to ciguatera poisoning—a foodborne illness caused by eating reef fish contaminated with toxins. Groupers also have high levels of mercury.
Final Thoughts:
Fish can be a healthy part of your diet, but it’s important to choose it wisely. Stick to low-mercury options like sardines, wild salmon, or cod. Always be aware of where your seafood comes from and choose sustainably caught fish whenever possible. By avoiding the most contaminated species, you can enjoy seafood without putting your health at risk.
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