Germs Quiz: What Lives in Your Mouth?

If you drop food on the floor, it won't pick up any germs if you pick it up within five seconds.

• True
• False

Correct Answer: False

While it's true that the longer food is on the floor, the more germs it will pick up, the "five-second rule" is arbitrary. Food starts to pick up germs from the moment it hits the floor. You're better off tossing it and eating something else.