The 12 Most Contaminated Fish to Avoid at the Grocery Store | November 24, 2025
Fish is often praised as a healthy source of protein, rich in omega-3 fatty acids and essential nutrients. However, not all fish are created equal. Due to pollution, farming practices, and environmental changes, some fish species contain high levels of toxins that can pose serious health risks.
Before adding fish to your cart, check out this list of the 12 most contaminated fish most often found in stores. Knowing what to avoid will help you protect your health.
1. Tilapia (farmed)
Farmed tilapia often comes from overcrowded fish farms where they are fed an unnatural diet. Many farms use antibiotics and chemicals, and studies have found high levels of contaminants in farmed tilapia from some countries.
