Within 48 hours of seeing two pink lines, I had a list of 37 things the internet told me I couldn't do anymore. No sushi. No soft cheese. No hot baths. No lying on my back. No lifting. No caffeine. No cleaning the cat litter. No eating for two but also no dieting. The list was so long and so contradictory that I ended up eating plain crackers and crying, which I'm fairly sure wasn't on any list.
Here's what I wish someone had told me: most of the "avoid" lists circulating online mix genuine, evidence-based risks with wildly overcautious advice. There are things that genuinely matter — alcohol, certain foods, specific medications — and then there's a huge amount of noise that exists to make pregnant women anxious.
This guide separates the two. Everything here is based on current NHS guidance, RCOG recommendations, and peer-reviewed evidence. No scaremongering, no overcaution, just what you actually need to know.
The Non-Negotiables: Things That Genuinely Matter
Alcohol — Stop Completely
This is the clearest, most evidence-based recommendation in all of pregnancy care. There is no known safe level of alcohol during pregnancy — not a glass of wine, not a small beer, not "just a sip." This is the position of the NHS, the RCOG, NICE, and the UK Chief Medical Officers (2016 Low Risk Drinking Guidelines).
Alcohol crosses the placenta freely. Your baby cannot metabolise it effectively. Exposure can cause fetal alcohol spectrum disorder (FASD), a lifelong condition affecting an estimated 1.8–3.6% of UK children, which includes learning difficulties, behavioural problems, and physical disabilities (Tommy's).
"But I drank before I knew I was pregnant" — Don't panic. Many women drink in the early weeks before a positive test. The risk from occasional light drinking at that very early stage is likely low. The important thing is to stop as soon as you know (Tommy's).
Smoking — Stop Completely
Smoking during pregnancy increases the risk of miscarriage, premature birth, low birth weight, stillbirth, and sudden infant death syndrome (SIDS). The NHS offers free stop smoking support and your midwife can refer you at your booking appointment. E-cigarettes are not risk-free but are considered significantly less harmful than smoking if you're struggling to quit — discuss with your midwife.
Vitamin A Supplements — Avoid
High doses of vitamin A (retinol) are teratogenic — they can cause birth defects. Do not take any supplements containing vitamin A, and avoid liver and liver products (pâté, liver sausage, haggis), which are extremely high in retinol (NHS: Foods to avoid). This is why you should take a pregnancy-specific multivitamin rather than a standard one — standard multivitamins often contain vitamin A. See our Prenatal Vitamins UK guide for safe options.
Note: beta-carotene (the form of vitamin A found in carrots, sweet potatoes, and other orange vegetables) is safe. Your body only converts it to retinol as needed. It's the pre-formed retinol in supplements and liver that's the concern.
Food: What the NHS Actually Says
The food avoidance rules exist because pregnancy temporarily suppresses your immune system, making you more vulnerable to three specific infections: listeriosis (from Listeria bacteria), toxoplasmosis (from Toxoplasma parasites), and salmonella. All three can cause miscarriage, stillbirth, or serious illness in your newborn.
In 2019, pregnancy-associated cases of listeria accounted for 18% of all UK cases, and one-third of these resulted in stillbirth or miscarriage (PEAR Study, 2024).
Here's the current NHS guidance, simplified:
Cheese
Avoid: Soft ripened cheeses with a white rind (brie, camembert, chèvre) and soft blue cheeses (Roquefort, Gorgonzola, Danish blue) — unless cooked until steaming hot. These can harbour Listeria.
Safe: Hard cheeses (cheddar, parmesan, Gruyère, Stilton), processed cheese, cream cheese, cottage cheese, mozzarella, halloumi, goat's cheese without a white rind, and any soft cheese that's been cooked until steaming hot (e.g. baked brie).
Eggs
Safe: British Lion-stamped eggs can be eaten runny or raw. The hens are vaccinated against salmonella. This includes in homemade mayonnaise, mousse, and icing — as long as they carry the red lion stamp.
Avoid: Non-Lion eggs and non-hen eggs (duck, quail, goose) should be cooked thoroughly (solid whites and yolks).
This is one of the most commonly misunderstood rules — you can absolutely have a runny egg if it's a British Lion egg. This guidance changed in 2017 and many websites still haven't updated.
Meat
Avoid: Raw or undercooked meat (especially poultry, pork, sausages, and burgers). Ensure no pink or blood remains. This prevents toxoplasmosis and salmonella.
Avoid: Cold cured meats (salami, chorizo, pepperoni, prosciutto, Parma ham) unless cooked thoroughly — for example, on a pizza. These are cured but not cooked, so they may carry toxoplasmosis parasites.
Safe: Cold pre-packed meats like ham and corned beef. Well-cooked meat of any kind. Cured meats that have been heated until steaming.
Fish
Avoid completely: Shark, marlin, and swordfish (high mercury).
Limit: Tuna — no more than 2 fresh tuna steaks or 4 medium cans per week. Oily fish (salmon, mackerel, sardines, trout) — maximum 2 portions per week due to pollutants (dioxins, PCBs).
Avoid: Raw shellfish, cold-smoked fish (smoked salmon, gravlax) unless cooked until steaming hot.
Safe: Cooked shellfish, cooked smoked fish, supermarket sushi (the fish has been frozen first, killing parasites), up to 2 portions of oily fish per week, white fish (unlimited).
Other foods to avoid
All pâté (including vegetable) — may contain Listeria.
Unpasteurised milk and dairy — risk of Listeria.
Raw or unwashed fruit and vegetables — wash thoroughly to remove soil and traces of Toxoplasma.
Enoki mushrooms — recently added to NHS guidance due to Listeria risk. Cook thoroughly.
Caffeine: The 200mg Rule
The NHS recommends limiting caffeine to 200mg per day during pregnancy. This is based on evidence that higher intakes are associated with increased risk of miscarriage and low birth weight.
A dose-response meta-analysis of 53 studies found that every 100mg increase in daily caffeine was associated with a 14% increased risk of miscarriage and a 7% increased risk of low birth weight (Greenwood et al., 2014). The American College of Obstetricians and Gynecologists (ACOG) concurred that moderate consumption below 200mg per day does not appear to be a major contributing factor (ACOG, 2010).
What 200mg looks like:
Instant coffee — approximately 100mg per mug (so 2 mugs daily)
Filter coffee — approximately 140mg per mug (so 1 mug daily, with room for a tea)
Tea — approximately 75mg per mug
Cola — approximately 40mg per can
Dark chocolate (50g) — approximately 25mg
The practical advice: You don't need to quit caffeine entirely. One or two cups of tea or coffee a day is fine within the 200mg limit. But be aware of cumulative intake — a morning coffee, an afternoon tea, and a can of cola is already pushing 215mg.
Energy drinks should be avoided — they often contain high caffeine levels plus other stimulants.
Medications: Check Everything
Many common medications are not safe in pregnancy. Some key ones to be aware of:
Ibuprofen (Nurofen) — Avoid throughout pregnancy, particularly from week 20 onwards. Use paracetamol instead for pain relief.
Aspirin — Avoid unless specifically prescribed by your doctor (low-dose aspirin is sometimes prescribed for pre-eclampsia prevention).
Some antibiotics — Many are safe, but some aren't. Always tell your prescriber you're pregnant.
Retinoid medications (isotretinoin/Roaccutane for acne) — Absolutely must be stopped before pregnancy. These cause severe birth defects.
Some antidepressants — Don't stop without medical advice. Your GP can review whether your current medication is pregnancy-safe or recommend a switch.
The rule: Don't stop any prescribed medication without consulting your GP or pharmacist. But do tell them you're pregnant immediately so they can review your prescriptions. This includes over-the-counter medications — always check the label or ask your pharmacist.
Activities: What's Actually Risky vs What's Overcautious
Cat litter — Be cautious but don't rehome the cat
Cat faeces can contain Toxoplasma parasites. If you must clean the litter tray, wear gloves and wash your hands thoroughly afterwards. Better yet, get someone else to do it. But you don't need to get rid of your cat — the risk comes specifically from handling contaminated faeces, not from stroking or living with your cat. Indoor cats who don't hunt are very low risk.
Also wear gloves when gardening, as outdoor cats may have used the soil.
Hot tubs and saunas — Avoid
Raising your core body temperature above 39°C may increase the risk of neural tube defects in the first trimester. Hot tubs and saunas can easily push your temperature above this threshold. A warm bath is fine — just keep it comfortable rather than steaming hot.
Exercise — Continue (with modifications)
The NHS and RCOG recommend continuing your normal exercise routine in pregnancy. Moderate exercise is safe and beneficial. Avoid contact sports, activities with a high fall risk, and exercising at altitude above 2,500m. See our Pregnancy Exercise Myths guide for the full evidence breakdown.
Hair dye — Probably fine
Most research suggests the chemicals in hair dyes are not highly toxic and the amount absorbed through the scalp is minimal. The NHS states that most experts consider hair dye safe during pregnancy, though some women prefer to wait until after the first trimester. Highlights and balayage (which don't touch the scalp) are lower risk still.
Flying — Safe until late pregnancy
Flying is generally safe until 37 weeks (or 32 weeks for twin pregnancies). Most airlines require a fit-to-fly letter from week 28 onwards. The main consideration is deep vein thrombosis (DVT) risk on long flights — wear compression socks, stay hydrated, and walk around regularly.
Sex — Safe unless advised otherwise
Normal sexual activity is safe throughout pregnancy unless your midwife or doctor has specifically advised otherwise (for example, if you have a low-lying placenta or are at risk of premature labour). Sex will not harm the baby.
The Overcaution Problem
Here's what frustrates me about most "what to avoid" lists: they present everything at the same level of urgency. Alcohol — genuinely dangerous — gets the same formatting as "avoid soft-serve ice cream from machines" (which isn't even on the current NHS list).
The result? Pregnant women become so overwhelmed that they either:
Ignore everything because the list feels impossible to follow, which means they miss the things that genuinely matter (alcohol, smoking, vitamin A).
Follow everything obsessively and spend nine months anxious, guilty, and eating nothing but plain pasta.
Neither is helpful. The evidence-based approach is:
Non-negotiable: No alcohol. No smoking. No vitamin A supplements or liver. Medications reviewed.
Important: Food safety rules (listeria, toxoplasmosis, salmonella risks). Caffeine under 200mg.
Sensible precaution: Avoid hot tubs/saunas. Wear gloves for cat litter and gardening. Check hair dye ingredients if you're concerned.
Probably unnecessary worry: Occasional sushi from a supermarket. A single accidental sip of wine. A warm (not hot) bath. Hair dye. Flying before 37 weeks. Sex.
Frequently Asked Questions
I ate brie before I knew I was pregnant — should I worry?
The risk from a single exposure is extremely low. Listeria contamination in commercially produced cheese is rare. If you feel well and have no symptoms (fever, muscle aches, nausea, diarrhoea), there's no need to do anything. Going forward, follow the guidance above.
Can I eat sushi?
Supermarket sushi is fine — the fish is frozen beforehand, which kills parasites. Restaurant sushi is also generally safe in the UK, but ask whether the fish has been frozen. Avoid sushi containing raw shellfish.
How much coffee can I actually have?
Up to 200mg of caffeine daily. That's roughly 2 mugs of instant coffee, or 1 mug of filter coffee plus a tea. You don't need to give it up entirely.
Can I use fake tan?
The NHS says it's generally considered safe during pregnancy, though there's limited research. The active ingredient (DHA) sits on the outer layer of skin and isn't absorbed into the bloodstream in significant amounts.
I accidentally took ibuprofen before I knew I was pregnant. Is my baby OK?
A single dose in very early pregnancy is extremely unlikely to cause harm. Ibuprofen becomes more concerning with regular use, particularly in the third trimester. Switch to paracetamol going forward and mention it to your midwife at your booking appointment.
Can I eat peanuts?
Yes. There's no evidence that eating peanuts during pregnancy affects your baby's risk of developing a peanut allergy. The old advice to avoid peanuts was withdrawn years ago. Only avoid them if you personally have a nut allergy.
Is it safe to clean with bleach and other household chemicals?
Yes, with normal precautions — use in well-ventilated areas and wear gloves if your skin is sensitive. You don't need to switch to special "pregnancy-safe" cleaning products.
The Bottom Line
Early pregnancy doesn't require you to live in a hermetically sealed bubble eating only organic vegetables and filtered water. It requires you to make a handful of genuinely important changes — stop alcohol, stop smoking, check your medications, follow basic food safety — and then continue living your life with reasonable caution.
The rest is noise. And if you accidentally eat a piece of salami before remembering the rules, your baby will almost certainly be absolutely fine.
Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. If you're concerned about anything you've consumed or been exposed to during pregnancy, contact your midwife or GP.
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