The five-second rule is a popular food safety myth that has been debunked by science. The rule states that if you drop food on the ground, you have five seconds to pick it up and eat it before it becomes contaminated with bacteria. However, there is no scientific evidence to support this claim.
In fact, studies have shown that bacteria can contaminate food within milliseconds. One study found that E. coli bacteria could transfer to food within five seconds. Another study found that staphylococcus aureus, a type of bacteria that can cause food poisoning, could transfer to food within two seconds.
So, why do people believe in the five-second rule? It may be because it is a convenient excuse to eat food that has fallen on the ground. Or, it could be because people overestimate the amount of time it takes for bacteria to transfer to food.
Whatever the reason, the five-second rule is a myth. If you drop food on the ground, it is best to throw it away.