Mayonnaise
Also listed as Mayo and Real Mayonnaise.
Condiments
This is what the ingredient is.
Mayonnaise is an emulsion of oil and egg. Labels may say mayonnaise or mayo.
Here is why it shows up on the label.
It is used as a sandwich spread and base for salads and sauces.
Here is what food agencies say.
FDA has a standard of identity for mayonnaise covering egg yolk and oil content.
Here is what research has found.
Egg allergen labeling and refrigeration of opened jars matter for safety.
Here are a few things worth knowing.
Contains egg. Keep refrigerated after opening. Not the same as eggless sandwich spreads.
Sources
- FDA Food Labeling
- USDA FSIS
- FDA Recalls
How to read this page
We publish plain facts about this ingredient so a label is easier to read. This is not medical advice, and it is not a recommendation to buy, avoid, or use anything. For a personal health question, talk with a clinician who knows your history.
v1.0Updated 9/15/2026