In households, restaurant kitchens, and almost anywhere people prepare or consume food, you'll occasionally hear someone call out "five-second rule." Whether it's uttered as a way for the speaker to let others know he's civilized, as an excuse to salvage expensive food, or as an incantation to ward off sickness, the meaning is the same: If food hits the floor and you snatch it up in less than five seconds, it's safe to eat."
Is the food really safe? Or should we throw it away or wash it off? WebMD talked to experts to find out what you should consider before swallowing this rule whole.