Mayonnaise Safety: When a Common Condiment Becomes a Food-Safety Concern
Mayonnaise is a widely used condiment known for its creamy texture and versatility, but improper handling can create food safety risks if basic storage guidelines are ignored.
Food safety experts note that store-bought mayonnaise is generally considered stable due to the use of pasteurized eggs and acidic ingredients, which help inhibit bacterial growth. However, safety depends heavily on how it is handled after opening.
Each time a utensil is used to scoop mayonnaise, there is a potential for introducing bacteria into the container. Leaving the product at room temperature—particularly in warm environments—for extended periods can further increase the risk of microbial growth. In general, food safety guidance recommends that perishable items should not be left out for more than two hours.
Proper refrigeration is essential. Mayonnaise should be consistently stored at or below 4°C (40°F) to maintain quality and reduce the risk of contamination over time. This is especially important after opening, when exposure to air and repeated use increases the chance of bacterial introduction.
Homemade mayonnaise carries a higher risk profile because it is often made with raw or lightly processed ingredients and lacks the same preservation controls as commercial products.
While mayonnaise is safe when handled correctly, experts emphasize that simple habits—such as prompt refrigeration and avoiding cross-contamination—are key to preventing potential foodborne illness.
