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Is Tuna safe in pregnancy?
Safe with limits
Up to 2 tuna steaks or 4 medium tins per week.
What the evidence says
Tuna is safe in pregnancy but should be limited because of its mercury content. The NHS advises no more than 2 fresh tuna steaks (about 140g cooked) per week, OR 4 medium-sized tins of tuna (140g drained) per week. This limit does not apply to other white fish.
Why this matters
Tuna contains more mercury than most other fish. High mercury exposure during pregnancy can affect the baby’s developing nervous system.
Source:NHS guidance on fish and shellfish in pregnancy
Last reviewed:April 2026
Please note — This is general guidance based on NHS advice as of April 2026. It is not medical advice. For advice on your specific pregnancy, please speak to your midwife or GP.
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