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Eating Off the Floor May Not Hurt You

Sara Haines explores the health reality of adopting the "5 second rule."
3:00 | 03/16/14

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Transcript for Eating Off the Floor May Not Hurt You
Now, to a turning scientific question, especially if you have children. Is the five-second rule for real? You know what I'm talking about. The supposed window of opportunity you have to snatch a chip or a cracker off the floor before it's too dirty to eat. There's a new study out. And Sara Haines is here with scientific answers. This is a rule I've used more than I like to admit. And I just did. You're trying to do too many things at once. Stuff drops. Often, I pick it up, brush it off and eat it. I live by the five-second rule. Am I fueliooling myself? We've all been there. You're juggling too many things. Five-second rule? Not just Jennifer aniston's character in "Along came polly. "The flood I love so much that if I dropped it on the floor and would eat ate anyway, is a nacho. Is there any truth to it. At a preliminary study in Birmingham, U.K., they discovered a direct link to the bacteria on the food to the time it's been on the floor. The key to the five-second rule is know where it dropped and use good judgment. Reporter: Where would you use the five-second rule? In the office? In the park? Why not? In the subway? That's not going to happen. In the bathroom? Not that hungry. Not all five seconds are created equal. Sometimes it's not where you're eating but what you're eating. If I dropped anything sticky, such as candy, pasta, I would not pick it up and eat it off the floor. If you drop some toast on the floor, probably not going to kill you. Reporter: Now, we're off to do our own highly analytical scientific study, bringing you what the people have to say. Do you ever use the five-second rule on food? Yes. Yes. Reporter: Where is it okay? If it's in your house. Everywhere. No. Reporter: Do you eat off the floor? No. Reporter: Cheers. That's delicious. Reporter: Not bad. In our highly scientific analytical double-blind study that we did in the park, we found out that three-quarters of the people that we asked, actually do use it. The number one place you should never use it is the sidewalk. Because I didn't want to leave you out. I brought you cashews from the shoot. I've been erratic about this. Now that I'm a mom, I'm a 25-second rule. You know what I'm talking about. We did studies. And Dan confirmed this possibly. You actually might have more than five seconds. Even though we say five seconds, you have forgiveness. Not all five seconds are created equal. They are not.

This transcript has been automatically generated and may not be 100% accurate.

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