The 5-Second Rule: Debunked - Food Safety Facts

Myth.

While it's true that food that has fallen on the floor should not be eaten after five seconds, this has nothing to do with bacteria or germs. Bacteria take much longer than five seconds to grow and multiply. The real reason not to eat food that has fallen on the floor is that it can be contaminated with dirt and other particles, which can cause stomach upset or other health problems.