Mayonnaise: Harmless or a Hidden Risk?
Mayonnaise may seem like a harmless kitchen staple, but when handled improperly, it can quickly become a food safety concern. Its creamy texture and mild flavor often mask the fact that it’s sensitive to temperature changes. When left out on the counter—or even stored improperly in the fridge door—bacteria can begin to multiply, particularly in homemade versions made with raw or unpasteurized eggs.
Commercial Mayonnaise: Safer Than You Think
Most store-bought mayonnaise is formulated with pasteurized eggs and added acids like vinegar or lemon juice, which help slow bacterial growth. However, that doesn’t make it immune to contamination. Every time a spoon or knife goes into the jar, new microbes can be introduced. If mayonnaise is left out at room temperature for more than two hours—especially in warmer conditions—those bacteria can multiply rapidly. To keep it safe, it should be stored consistently below 40°F (4°C) and returned to the refrigerator promptly after use.
The Bottom Line
Mayonnaise itself isn’t inherently dangerous—but how it’s handled makes all the difference. Practicing simple habits like using clean utensils, avoiding prolonged exposure to room temperature, and storing it properly can significantly reduce the risk, keeping this popular condiment safe to enjoy.
