Which fish contains a higher level of methyl mercury and should be avoided during pregnancy?

Which fish contains a higher level of methyl mercury and should be avoided during pregnancy?

• A. Salmon
• B. Tilapia
• C. Pollock
• D. Swordfish

Answer: (D)

Methylmercury exposure from fish and its impact on fetal development: methylmercury is a neurotoxin that can cross the placenta, so levels in fish are a concern during pregnancy. Larger, long-lived predatory fish tend to accumulate more methylmercury through bioaccumulation, making them higher risk. Swordfish stands out as one of the highest-mercury options and should be avoided during pregnancy. The other fish listed—salmon, tilapia, and pollock—are generally lower in methylmercury and are safer choices when consumed in moderation as part of a balanced diet. To reduce risk, focus on low-mercury fish and follow guidelines about portion size and frequency.

Methylmercury exposure from fish and its impact on fetal development: methylmercury is a neurotoxin that can cross the placenta, so levels in fish are a concern during pregnancy. Larger, long-lived predatory fish tend to accumulate more methylmercury through bioaccumulation, making them higher risk. Swordfish stands out as one of the highest-mercury options and should be avoided during pregnancy. The other fish listed—salmon, tilapia, and pollock—are generally lower in methylmercury and are safer choices when consumed in moderation as part of a balanced diet. To reduce risk, focus on low-mercury fish and follow guidelines about portion size and frequency.