Can you eat surströmming while pregnant?
Not advisedNo, skip surströmming during pregnancy. It is raw herring preserved by salt fermentation rather than cooking, which leaves both a Listeria and a botulism risk.
Why
Surströmming is never cooked: the herring is salted and left to ferment in a sealed tin, so it reaches the table as a raw, ready-to-eat fish. The CDC warns pregnant women off raw and refrigerated ready-to-eat fish because Listeria survives salt and cold and crosses the placenta, and it separately flags traditionally fermented fish as a known cause of botulism, since the low-oxygen, low-acid conditions inside the container are exactly what Clostridium botulinum needs. Neither risk is reduced by the strong smell or the brine.
Safer alternatives
- Pickled herring that has been heat-treated, served steaming hot
- Grilled fresh herring with mustard butter
- Tinned sardines or mackerel
- Hot-smoked salmon heated until piping hot
- Swedish meatballs with lingonberry instead of the fish course
Sources
- CDC https://www.cdc.gov/botulism/prevention/index.html
- CDC https://www.cdc.gov/food-safety/foods/pregnant-women.html
Every verdict follows our sourcing methodology: official health guidelines only, most cautious position when they differ.
Last reviewed by the pregAI editorial team.
Frequently asked questions
Can I cook surströmming to make it safe?
Heating it until steaming hot would deal with Listeria and would inactivate botulinum toxin. In practice nobody serves it that way, and a tin that has swollen or hissed abnormally should be thrown out rather than cooked.
I ate surströmming before I knew I was pregnant, what now?
One portion is very unlikely to have caused a problem, since both Listeria infection and botulism are rare. Watch for fever, chills, muscle aches, double vision or drooping eyelids over the next few weeks and get seen quickly if any appear.
Is the same true of Norwegian rakfisk and Alaskan stinkheads?
Yes, they are the same category of uncooked fermented fish and carry the same Listeria and botulism concerns. The CDC names traditionally fermented fish directly in its botulism guidance.
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Get instant verdicts on any foodpregAI is informational only and is not medical advice. Always check with your doctor or midwife about anything specific to your pregnancy.