Tuna is a convenient, high-protein pantry staple that provides essential fatty acids for your baby's growing brain. But because tuna is a predatory fish, it also accumulates mercury, requiring a balanced approach to how much you eat.
Safety Verdict
Tuna is safe in moderation. Pregnant women can safely eat up to 12 ounces (2-3 servings) of 'Canned Light' tuna per week. 'Albacore' or 'White' tuna should be limited to 6 ounces per week.
Medical Insights & Science
Mercury is a heavy metal that can build up in the bloodstream over time. Predatory fish like tuna consume smaller fish, accumulating the mercury from those fish in their own tissues. High levels of mercury in a pregnant woman's blood can cross the placenta and potentially interfere with the development of the baby's brain and nervous system. Canned light tuna is typically made from smaller skipjack tuna, which has lower mercury levels than larger albacore.
Risks & Benefits
- • Rich in DHA for brain growth
- • Excellent source of Vitamin D
- • Risk of mercury accumulation
- • Supports cardiovascular health
- • Promotes healthy fetal weight
Safety Guidelines
- ✅ Choose 'Light' over 'White' — Check the label on your canned tuna. 'Light' tuna is significantly lower in mercury than 'Albacore' or 'White' tuna.
- ✅ Avoid Tuna Steaks — Fresh or frozen tuna steaks are usually from larger tuna species and contain much higher mercury levels than canned varieties.
- ⚠️ Track your servings — Keep a mental note of your seafood intake for the week to ensure you don't exceed the 12-ounce combined limit for low-mercury fish.
Safe Alternatives
Salmon, sardines, herring, and trout are all very low in mercury and high in healthy Omega-3s.