Ever dropped a piece of candy on the floor and quickly picked it up to eat? The famous 'five-second rule' suggests that food is safe if retrieved in under five seconds, free from harmful bacteria. But is there truth to this longstanding habit?
The Science Backs It—With Caveats
Recent studies confirm the five-second rule has merit, but success hinges on the food type and landing surface.
Key Factors at Play
Food dropped on carpet picks up bacteria more slowly than on hard floors. Moist, sticky items like candy fare better within the five-second window.
How Researchers Tested It
Scientists dropped foods such as candy, pasta, and cookies onto various surfaces, leaving them for 3 to 30 seconds to measure bacterial transfer.
Beyond Five Seconds
Under five seconds, most foods showed negligible bacteria. Exceed that, and contamination risk escalates rapidly.
Source: Today.com | Image: Shutterstock
