Originally Posted by bbuddha
Just so you know, because of it's high ph,
commercially made mayonnaise is actually pretty safe to carry unrefridgerated. So make that tuna fish sandwich and be worry free!
After getting food poisoning from mayonnaise that was supposidly cold I do worry & will not consume it unless it is kept cold after it is opened.
I had a lunch at a hotel buffet one time. The mayo. was in a bowl on top of ice. I used it on my sandwhich. 2 days later I had food poisoning from it. WHen I was tested for it I was told it was not from the meat or the cheese, but the mayo. After that I do not trust mayo. or anything with mayo. in it, like salads if it is out in the open.
If I make a sandwhich with mayo. on it & carry it in my bags to work it will be packed with an ice pack to keep it cold.