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Everybody knowsthe five second rule.

5 Second Rule - Just Spit it Out!

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The original Five Second Test • UsabilityHub

Researchers at RutgersUniversity say they’ve “disproven” the notion that it’s OK to eat food that’s fallen onthe floor, as long as you do it within within five seconds.

Researchers then looked at four different contact times – less than onesecond, five seconds, 30 seconds and 300 seconds – and used two media – trypticsoy broth or peptone buffer – to grow a nonpathogenic “cousin” of salmonellathat naturally occurs in the digestive system.

Food-on-floor "five second rule" debunked - CBS News

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    Researchers then looked at four different contact times – less than one second, five seconds, 30 seconds and 300 seconds – and used two media – tryptic soy broth or peptone buffer – to grow a nonpathogenic “cousin” of salmonella that naturally occurs in the digestive system.

    In , the five-second rule of states that food (or sometimes cutlery) dropped on the ground will not be significantly contaminated with if it is picked up within five seconds of being dropped. Some may truly believe this assertion, whereas most people employ the rule as an amusing social fiction that allows them to eat a dropped piece of food, despite the potential reservations of their peers. The "rule" has been scientifically proved false.