Foods to Avoid During Pregnancy: The Complete Safety List

Food safety during pregnancy does not mean eating a narrow or joyless diet. It means knowing which specific foods carry real risk — Listeria monocytogenes, mercury, and foodborne pathogens — and making straightforward swaps. Most of what you eat every day is completely fine. This guide focuses on the exceptions: the foods where the evidence is clear enough that clinical bodies have issued formal guidance to avoid or limit them.

This article provides general nutrition information, not medical advice. Always talk to your prenatal provider about your specific diet, health history, and any concerns.

What Foods Carry a Listeria Risk During Pregnancy?

Listeria monocytogenes is the pathogen at the center of most pregnancy food-safety guidance. Unlike most food-borne bacteria, Listeria thrives in refrigerator temperatures and can cross the placenta — making it uniquely dangerous for pregnant women and their babies. Listeriosis during pregnancy can cause spontaneous abortion, stillbirth, premature labor, or life-threatening neonatal infection, even when the mother herself has only mild flu-like symptoms.

According to the March of Dimes, the food categories that carry Listeria risk include:

• Refrigerated deli meats and sliced cold cuts — turkey, ham, roast beef, salami, bologna, hot dogs
• Pâté and meat spreads (refrigerated; shelf-stable or canned versions are acceptable)
• Refrigerated smoked seafood — lox, kippered salmon, smoked trout, smoked mackerel (canned or shelf-stable versions are fine)
• Refrigerated prepared deli salads — pasta salad, egg salad, tuna salad, chicken salad prepared in-store
• Unpasteurized soft cheeses — brie, camembert, queso fresco, certain feta varieties
• Unpasteurized milk and juice

The practical solution for deli meats and smoked seafood is heat: bring them to 165°F (74°C) and eat immediately while still steaming. This reliably kills Listeria. For cheeses, choose pasteurized versions — check the label — or opt for hard cheeses like cheddar, Gruyère, or Parmesan, which are safe regardless of pasteurization because their low moisture content inhibits bacterial growth.

Which Fish and Seafood Should You Avoid or Limit?

Fish is genuinely beneficial during pregnancy — it is one of the best dietary sources of DHA, the omega-3 fatty acid critical for fetal brain and eye development. The goal is not to avoid seafood but to choose the right kinds and amounts.

The FDA and EPA advise pregnant women to eat 8–12 ounces (2–3 servings) of low-mercury seafood per week — and to avoid specific high-mercury species entirely. The "do not eat" list for pregnant women includes:

FDA Mercury Risk Classification for Pregnant Women

Category	Fish / Seafood	Guidance
Do not eat	Bigeye tuna, king mackerel, orange roughy, shark, swordfish, tilefish (Gulf of Mexico)	Avoid entirely — highest mercury
Limit	Albacore (white) canned tuna	Max 6 oz per week
Safe — eat regularly	Salmon, sardines, shrimp, pollock, catfish, canned light tuna (skipjack), tilapia, cod	8–12 oz total per week
Avoid entirely (raw)	Sushi, sashimi, ceviche, raw oysters, raw clams, raw scallops	Pathogen risk (Listeria, Vibrio, Toxoplasma) + mercury

Raw fish and shellfish carry a double risk: mercury in some species, plus microbial pathogens — Listeria, Vibrio, and Toxoplasma — that pose serious risks to the developing baby. Mayo Clinic advises avoiding all raw or undercooked seafood throughout pregnancy. Cooked sushi made with low-mercury fish (such as shrimp tempura rolls, salmon rolls with cooked salmon, or California rolls with imitation crab) is generally acceptable.

What About Caffeine, Alcohol, and Other Dietary Limits?

Caffeine. ACOG recommends keeping caffeine below 200 mg per day — approximately one 12-ounce brewed cup of coffee. The reasoning: caffeine crosses the placenta freely and the fetus lacks the enzymes to metabolize it. Caffeine also clears from the mother's system progressively more slowly as pregnancy advances — up to 65% more slowly by the third trimester — meaning even the same coffee you drank before pregnancy stays in your body longer. Count all sources toward your daily total:

• Brewed coffee: 95–165 mg per 12 oz
• Espresso: 63 mg per shot
• Tea (black or green): 30–60 mg per 8 oz
• Cola sodas: ~35 mg per 12 oz
• Energy drinks: 80–200 mg per serving
• Dark chocolate: ~20–30 mg per ounce
• Some OTC headache medications (e.g., Excedrin): 65 mg per tablet

A 2024 Finnish prospective cohort study (published in PMC) found that even moderate caffeine intake of 51–200 mg per day in the first trimester was associated with increased risk of small-for-gestational-age newborns. ACOG's formal guidance has not changed, but this data reinforces the case for minimizing caffeine rather than simply staying under the ceiling.

Alcohol. There is no established safe amount of alcohol during pregnancy. ACOG, the CDC, and the U.S. Surgeon General all recommend complete abstinence throughout pregnancy. Fetal alcohol spectrum disorders can result from any level of exposure, and no trimester is a safe window. This is one area where "just a little" carries genuine documented risk.

Raw sprouts. Alfalfa, clover, radish, and mung bean sprouts have been linked to multiple Salmonella and E. coli outbreaks. The warm, humid conditions required for sprouting are also ideal for bacterial growth, and washing does not reliably remove contamination. The March of Dimes lists raw sprouts among foods to avoid throughout pregnancy. Cooking sprouts thoroughly — stir-frying or adding to hot dishes — eliminates the pathogen risk.

Undercooked meat, poultry, and eggs. Meat and poultry should be cooked to safe internal temperatures throughout pregnancy: 165°F for poultry and ground meats, 160°F for pork and beef. Raw or runny eggs carry Salmonella risk; choose pasteurized eggs if you want to use them in preparations that won't be cooked (such as homemade mayonnaise or Caesar dressing). Restaurant or store-bought versions made with pasteurized eggs are generally safe.

Herbal teas and supplements. Most herbal teas have not been studied for pregnancy safety, and some — including pennyroyal, black cohosh, and blue cohosh — are explicitly contraindicated. Chamomile and ginger in food quantities are generally considered low-risk; ginger tea in modest amounts is often used for nausea relief. If you drink herbal teas regularly, bring the ingredient list to your prenatal appointment for review. This also applies to herbal supplements: some are safe, many are unstudied, and a few are known risks.

A Quick Reference: Foods to Avoid vs. Foods to Limit

The distinction between "avoid entirely" and "limit" is clinically meaningful. Here is a summary organized by risk category:

• Avoid entirely: Alcohol; raw or undercooked fish and shellfish; high-mercury fish (bigeye tuna, swordfish, shark, king mackerel, orange roughy, Gulf tilefish); unpasteurized milk, juice, and soft cheeses; raw sprouts; refrigerated smoked seafood (unless canned); refrigerated deli salads; raw or undercooked meat, poultry, and eggs
• Limit: Caffeine (under 200 mg/day); albacore canned tuna (under 6 oz/week); deli meats and hot dogs (acceptable only if heated to steaming); fish from polluted local waters (follow local advisories)
• Safe and beneficial: Cooked low-mercury seafood (8–12 oz/week); pasteurized dairy; hard cheeses; well-cooked eggs; cooked sushi with low-mercury species; canned light tuna within weekly limits; ginger in food quantities

Eating well in pregnancy does not require perfection or anxiety. If you had a turkey sandwich before you knew about the deli-meat rule, one exposure is unlikely to cause harm — the risk is cumulative and ongoing, not catastrophic from a single meal. The value of these guidelines is building consistent habits over the full course of pregnancy, not catastrophizing individual choices.

If you have questions about a food not on this list, or if you have dietary restrictions that make navigating these rules complicated (vegetarian, vegan, food allergies, severe first-trimester nausea), a registered dietitian who specializes in maternal nutrition can help you build a plan that works for your life. Your prenatal provider is also always the right first stop for personalized guidance.