There are times when there is no room in my fridge. The longest I've ever kept a pizza at room temperature was about a day and a half. Can it sit out longer or is a day and a half also unsafe?|||I have this problem with my boyfriend all the time, he thinks it's ok to leave pizza out, but it's not, it can build bacteria and spoil. The cheese is made of milk, would you leave milk out for days and still drink it? It's not going to kill you, but it can make you sick. I wouldn't leave it out longer then a couple of hours.|||I think while in college we ate some seven days old.|||27 hours|||I would say overnight. But I think after that its pushing it unless you nuke it.|||It is unsafe after about 2 hours.|||12hrs

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