Muka · Pregnancy guide
Can You Eat Prawns When Pregnant?
Updated June 2026 · based on NHS and official food-safety guidance
Cooked prawns are safe and a great low-mercury source of protein. The NHS lists cooked shellfish such as prawns among the foods you can eat, and the FDA rates shrimp/prawns a "Best Choice" in pregnancy. Only avoid raw or undercooked prawns, which can carry bacteria, viruses or toxins that cause food poisoning.
Prawns are one of the few "yes" foods on most pregnancy lists, which is a nice surprise if you love them. The rule is simple: cooked is safe, raw is not. Whether you call them prawns (UK) or shrimp (US), official guidance from the NHS and the FDA agrees. This guide walks through which prawn dishes are fine, which to skip, and how to tell when prawns are properly cooked, so you can order or cook them with confidence. For a specific product, the Muka app gives you a verdict in 3 seconds by barcode scan or photo.
Which prawn dishes are safe in pregnancy?
| Prawn dish | Verdict | Why |
|---|---|---|
| Hot, thoroughly cooked prawns (pink and firm) | Safe | Cooking until pink, opaque and firm kills harmful bacteria and viruses. The NHS lists cooked shellfish such as prawns as safe, and the FDA rates them a Best Choice for their low mercury. |
| Cold pre-cooked prawns (prawn sandwich, salad) | Safe | Ready-to-eat prawns sold pre-cooked are safe cold, as long as they're kept chilled and eaten by the use-by date. The prawns have already been fully cooked. |
| Prawn cocktail | Safe | Although served cold, a prawn cocktail is made with cooked prawns, so it's fine. Just make sure it has been kept properly chilled and is fresh. |
| King prawns / tiger prawns | Safe | Size and type don't change the rule. King prawns are safe when thoroughly cooked through to the centre, exactly like smaller prawns. |
| Raw or undercooked prawns (sushi, sashimi, ceviche) | Avoid | The NHS advises avoiding all raw shellfish in pregnancy, as it can carry harmful bacteria, viruses or toxins that cause food poisoning. Ceviche only marinates prawns in acid rather than cooking them with heat, so it counts as raw. |
| Reheated leftover prawns | In moderation | Fine if reheated once until piping hot all the way through and not left out at room temperature. Don't reheat prawns more than once, and discard if in doubt. |
Not sure about a specific product?
Scan its barcode or snap a photo: Muka tells you in 3 seconds whether it's safe to eat while pregnant, explains why, and suggests a safe alternative. Free and unlimited.
Download Muka on the App StoreFrequently asked questions
Can you eat cold cooked prawns when pregnant?
Yes. Cold prawns are safe in pregnancy as long as they were fully cooked first, which pre-packed ready-to-eat prawns always are. Keep them chilled in the fridge, check the use-by date, and don't leave them sitting at room temperature. A prawn sandwich or prawn salad made with cooked prawns is fine.
Is prawn cocktail safe during pregnancy?
Yes, prawn cocktail is safe even though it's served cold, because it's made with prawns that have already been cooked. Make sure it has been kept properly chilled and is freshly prepared. The cooking is what matters for safety, not the temperature it's served at, so a chilled prawn cocktail poses no extra risk.
I ate raw or undercooked prawns while pregnant. Should I worry?
Try not to panic. A single exposure usually causes no harm, and most people are completely fine. Watch for food-poisoning symptoms like vomiting, diarrhoea or fever over the next couple of days. If you feel unwell or are worried, contact your midwife, GP or maternity unit for advice and reassurance.
How do I know when prawns are properly cooked?
Raw prawns are greyish and translucent. Once fully cooked they turn pink or red on the outside, the flesh becomes opaque and pearly white, and they curl up and feel firm. Cook until piping hot all the way through. If any part still looks grey or glassy, keep cooking before eating.
How many prawns can I eat per week when pregnant?
Prawns are low in mercury, so they're a Best Choice seafood. The FDA recommends 2 to 3 servings (about 8 to 12 ounces) of low-mercury seafood a week, and prawns count toward this. There's no specific prawn limit, so enjoy them as part of a varied, balanced seafood intake.
Sources
- NHS — Foods to avoid in pregnancy: nhs.uk
See also: how Muka works, the pregnancy food scanner that answers “can I eat this while pregnant?”.