Can I Eat Mayonnaise During Pregnancy?

Quick Answer: ✅ GENERALLY SAFE (per FDA/ACOG guidelines) — Commercial mayonnaise is generally considered safe by medical authorities during pregnancy. Store-bought brands use pasteurized eggs and are acidified to prevent bacterial growth. Homemade mayo made with raw eggs must be avoided.

The Short Answer

Is mayonnaise really off-limits during pregnancy, or is it just another pregnancy food myth? The answer depends entirely on whether your mayo came from a jar or a blender.

Commercial mayonnaise—Hellmann's, Duke's, store brands, all the mainstream products—is generally considered safe by medical authorities during pregnancy because manufacturers use pasteurized eggs (heat-treated to kill Salmonella) and acidify the product to prevent bacterial growth. The combination of pasteurized eggs and low pH makes it shelf-stable and safe.

The only mayo to avoid is homemade versions made with raw eggs. So if your sandwich has store-bought mayo, you're absolutely fine. If you're considering making mayo from scratch with raw eggs at home, that's where caution applies. This distinction makes it easy: enjoy your favorite mayo-based foods without worry.

Why Mayonnaise and Pregnancy

Mayonnaise is a staple condiment in many cuisines and dietary patterns, and avoiding all mayonnaise unnecessarily during pregnancy can limit food enjoyment and nutritional variety. Mayonnaise is primarily composed of oil, eggs, and acidifying agents, providing caloric energy and fat-soluble nutrients like vitamin E and retinol from the egg yolk component.

The historical concern linking mayonnaise to food safety during pregnancy relates to Salmonella enteritidis, a bacterium that can contaminate raw eggs and cause gastroenteritis. While non-pregnant adults typically experience self-limited diarrhea and abdominal pain from salmonellosis, pregnant women face heightened infection severity and potential complications.

Severe dehydration from salmonellosis can precipitate preterm labor. Maternal sepsis from Salmonella infection, though rare, carries substantial maternal morbidity risk. Additionally, Salmonella can cross the placenta and cause fetal infection, resulting in intrauterine growth restriction, preterm birth, or neonatal sepsis.

Given these potential complications, FDA advises avoiding raw eggs during pregnancy. However, this guidance applies exclusively to raw eggs. Commercial mayonnaise, which contains no raw eggs, does not pose this risk.

How Mayonnaise Is Safe

Egg Pasteurization: Commercial mayonnaise manufacturers subject eggs to pasteurization—a thermal process that exposes the product to specific temperature and time combinations that eliminate pathogens including Salmonella, Listeria monocytogenes, and Staphylococcus aureus.

The USDA Food Safety and Inspection Service (FSIS) mandates that eggs used in commercial food products reach a minimum internal temperature of 160°F (71°C) for 3.5 minutes, or equivalent time-temperature combinations that achieve equivalent microbial reduction. This pasteurization process is completed before the eggs are incorporated into mayonnaise.

When you purchase Hellmann's, Best Foods, Duke's, Kraft, store-brand, or other commercial mayonnaise, the product is guaranteed to contain only pasteurized eggs. The pasteurization process does not change the nutritional profile or flavor of the eggs; it simply eliminates potential pathogens.

Acidification: Beyond pasteurization, commercial mayonnaise is formulated with vinegar or citrus juice that maintains a pH below 4.0. This acidic environment is hostile to most pathogens, including Salmonella, Listeria, and pathogenic E. coli.

The low pH acts as a secondary preservation mechanism, preventing both the growth of new pathogens and the multiplication of any organisms that might be introduced post-manufacturing. This is why commercial mayonnaise remains shelf-stable and safe at room temperature before opening.

FDA Verification: The FDA regulates mayonnaise as a "standardized food" under 21 CFR 169.140, which specifies the minimum composition and manufacturing requirements. All commercially produced mayonnaise sold in the United States must meet these standards, including the pasteurization requirement. FDA inspectors conduct regular audits of mayonnaise manufacturing facilities to ensure compliance.

Homemade Mayonnaise Caution: Homemade mayonnaise made with raw eggs does not undergo pasteurization and lacks the regulated acidification of commercial products. A single raw egg carries approximately a 1 in 30,000 risk of internal Salmonella contamination. During pregnancy, this risk is unacceptable.

ACOG recommends avoiding all raw and undercooked eggs during pregnancy, which extends to homemade mayo prepared with unpasteurized eggs.

Store-Bought vs. Homemade: Key Safety Distinctions

The difference between commercial and homemade mayonnaise is substantial from a food safety perspective. Commercial manufacturers use pasteurized eggs and maintain strict pH controls documented through laboratory testing. These products are subject to FDA inspection and regulatory oversight.

Homemade versions, even when made with carefully sourced ingredients, cannot guarantee the same level of bacterial elimination.

Some pregnant individuals attempt to mitigate homemade mayo risk by using pasteurized eggs purchased at retail (specifically labeled "pasteurized eggs"), which is a reasonable approach and allows homemade preparation with equivalent safety to commercial products.

However, any homemade mayo using conventional eggs—even from organic or free-range sources—poses unquantifiable risk during pregnancy.

Nutritional Profile

Mayonnaise Nutrition (per 1 tablespoon, 14g):

Mayonnaise is calorie-dense and fat-rich, making portion control important, particularly for pregnant individuals managing gestational weight gain. However, the fat profile is largely unsaturated, with significant polyunsaturated fat content that provides omega-6 fatty acids. Mayonnaise also delivers vitamin E, a fat-soluble antioxidant important for fetal development and placental function.

Healthy integration strategies:

• Use mayonnaise in measured amounts (1–2 tablespoons per sandwich) rather than excessive quantities
• Combine with vinegar-based or mustard-based condiments to add flavor without increasing mayo volume
• Choose "light" or "reduced-fat" mayonnaise options if caloric intake is a concern (approximately 50 calories per tablespoon vs. 100 for regular)
• Balance mayo-containing foods with vegetables and lean proteins to create nutrient-balanced meals
• Monitor sodium intake, as mayonnaise contributes sodium when consumed with processed meats or salted snacks

The key consideration during pregnancy is not avoiding mayonnaise entirely, but incorporating it mindfully as part of an overall balanced diet.

Trimester-Specific Considerations

First Trimester: During the first trimester, many pregnant individuals experience aversions to certain foods while craving others.

If you have cravings for foods typically prepared with mayonnaise (egg salad, tuna salad, chicken salad, sandwiches), commercial mayo is safe and can support adequate caloric and nutrient intake during a period when nausea may limit food consumption.

The confidence that commercial mayo is safe may ease anxiety around food choices during this vulnerable time.

Second Trimester: As caloric needs increase by approximately 300 calories per day during the second and third trimesters, mayonnaise provides energy-dense calories. This is also the period when many pregnant individuals experience renewed appetite after first-trimester nausea. Mayonnaise-based salads and sandwiches can facilitate nutrient intake if balanced with vegetables and lean proteins.

Third Trimester: As gestational weight gain accelerates and hunger increases, portion control of high-calorie condiments becomes increasingly relevant. Limiting mayonnaise to measured amounts helps optimize gestational weight gain—guidelines suggest 25–35 pounds for normal pre-pregnancy BMI individuals. However, moderate mayo consumption remains fully safe.

FAQ

Q: If I accidentally ate homemade mayo made with raw eggs, should I be concerned? A: Contact your healthcare provider immediately. While the risk is low (approximately 1 in 30,000 per raw egg), Salmonella infection during pregnancy carries serious potential consequences.

Your provider may recommend monitoring for symptoms (fever, severe abdominal pain, diarrhea) and may order stool testing to detect Salmonella colonization, even if you remain asymptomatic.

Q: Are organic or gourmet mayonnaise brands different from standard commercial brands? A: All commercial mayonnaise sold in the United States, regardless of brand or price point, must comply with FDA standards for pasteurization and composition. Organic mayonnaise uses organic eggs, but the eggs are still pasteurized.

Premium or gourmet brands adhere to the same food safety regulations as budget brands. The choice is based on taste preference and cost, not food safety.

Q: Is aioli safe during pregnancy? A: Aioli made with pasteurized eggs (available commercially or made in restaurants using pasteurized eggs) is safe. Homemade aioli made with raw eggs must be avoided. When dining out, ask the restaurant whether their aioli is made with raw or pasteurized eggs.

Q: Can I make mayonnaise using pasteurized eggs at home? A: Yes, if you use pasteurized eggs. Food-grade pasteurized eggs are available in most grocery stores (sold in the egg section, often labeled "pasteurized"). These are safe for homemade mayo preparation. Alternatively, some recipes use pasteurized egg yolk products available online or in specialty food stores.

Q: Does heating or cooking food with mayo change its safety? A: If you cook a mayo-based dish to a safe food temperature (typically 165°F for most foods containing eggs or meats), any residual concern about the mayo itself is eliminated. However, commercial mayo is already safe, so heating is unnecessary for safety purposes.

Sources

1. U.S. Food and Drug Administration (FDA). "Code of Federal Regulations Title 21, Part 169.140: Mayonnaise." https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfCFR/CFRSearch.cfm?fr=169.140

2. U.S. Department of Agriculture (USDA) Food Safety and Inspection Service (FSIS). "Egg Products." Directive 7620.1. https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/eggs

3. American College of Obstetricians and Gynecologists (ACOG). "Food Safety for Pregnant Women." Committee Opinion No. 548, 2012.

4. Centers for Disease Control and Prevention (CDC). "Salmonella." https://www.cdc.gov/salmonella/general/index.html

Related Resources:

• Pregnancy Safe Food Checker
• Pregnancy Nutrition Guide
• Pregnancy Weight Gain Calculator
• Food Pasteurization and Pregnancy Safety
• Raw Egg Risks During Pregnancy