Is mayonnaise considered a dairy product?

 Well, mayonnaise is made primarily from eggs and vegetable oil, and — last we checked — neither of those came from cows, so our best guess would be no.

Even in the categories of the old Food Pyramid (when one size did fit all), mayonnaise was in the Fats, Oils, and Sweets category, and not the dairy-based Milk, Yogurt, and Cheese group.

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