Is It Safe to Eat Pizza That's Been Left Out Overnight?

In This ArticleView AllIn This ArticleIs It Safe to Eat Pizza That Sat at Room Temperature for Hours?What Are the Dangers of Eating Pizza That Sat Out Overnight?What Symptoms Should I Look Out For? What Should I Do If I Get Sick?But I’ve Eaten Pizza That Sat Out and I Didn’t Get Sick—Why?What About a Meatless or Vegan Pizza? Can I Eat That If It Sat Out?OK, I’m Convinced. Now How Do I Store My Pizza Safely?Bottom Line

In This ArticleView All

View All

In This Article

Is It Safe to Eat Pizza That Sat at Room Temperature for Hours?

What Are the Dangers of Eating Pizza That Sat Out Overnight?

What Symptoms Should I Look Out For? What Should I Do If I Get Sick?

But I’ve Eaten Pizza That Sat Out and I Didn’t Get Sick—Why?

What About a Meatless or Vegan Pizza? Can I Eat That If It Sat Out?

OK, I’m Convinced. Now How Do I Store My Pizza Safely?

Bottom Line

Eating pizza that sat out all night is a lot like falling asleep without taking your contacts out or brushing your teeth—three things that can go hand-in-hand after a long night out on the town. We all know it’s probably not a great idea, but just how bad is it to eat the leftover pizza? Can it really be that ill-advised if we made it through our 20s with no horrific bouts of food poisoning? To find out, I checked with food safety experts from theUSDAand theCleveland Clinic.

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Like other perishable foods, pizza that has been at room temperature—or anywhere in the 40°F to 140°F danger zone— for more thantwo hoursshould not be consumed, confirms Meredith Carothers, a food safety specialist with theUSDA’s Food Safety and Inspection Service. In addition, if the temperature is above 90°F, perishable food should not sit out for more than an hour, per the USDA.

Any bacteria that are present on your leftover pizza grow rapidly in that danger zone between 40°F and 140°F, and can double in number in as little as 20 minutes, Carothers says. That means you’re vastly increasing your risk of being exposed to foodborne pathogens—and possibly coming down with a foodborne illness—if you dig into that slice sitting on the counter when you wake up.

While many instances of food poisoning resolve on their own, if you have symptoms that are severe or last more than 24 hours, you should seek medical attention. Further, children, pregnant women, older adults and those with weakened immune systems are at higher risk from foodborne illness and should get medical attention immediately if food poisoning is suspected,according to the USDA.

I asked the experts how is it that so many people got through college eating leftover

pizza that sat out, if it’s so dangerous. “Many individuals may choose to indulge in pizza that’s been sitting out overnight and not get sick,” Sedlacek concedes. “However, while we’re not able to see the bacteria that may grow on food that sits out, it does not mean it’s not there and can put you at risk for foodborne illnesses.” Ultimately, you probably just got lucky if you ate pizza that sat out and felt fine.

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Sorry to say, the same food safety rules apply no matter what kind of pizza you left out. “The safe period for different kinds of pizza does not vary,” says Sedlacek. “If the pizza contains cheese and meat, or if you’re enjoying a vegetarian or vegan pizza, both contain perishable items that can collect bacteria if not stored properly.”

Sedlacek says to place your leftover pizza in an airtight container or wrap it tightly and then get it into the fridge. Leftovers, including pizza, can be kept in the fridge for three to four days, according to theUSDA. You can also freeze pizza—it’ll be safe indefinitely but for the best flavor and texture, try to eat it within three months. Thaw leftovers in the fridge, not on the counter, to avoid providing a breeding ground for bacteria, says Sedlacek, citingUSDA food safety guidelines. Sedlacek and the USDA also recommend aiming for an internal temperature of 165°F when reheating food to ensure food safety.

You may have gotten away with eating pizza that sat out in the past without consequences, but that doesn’t mean you’ll be unscathed next time. So, if it sat out overnight, toss that pizza in the trash or compost bin, and spare yourself the risk of foodborne illness. Better yet, refrigerate the leftovers within two hours and you can reheat them the next day (or eat cold pizza if that’s your style).

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