A health warning for snack-loving girls: experts debunk the “five-second rule” and reveal the harsh truth about food that falls on the floor
You really can’t pick it up and eat it anymore 😱
Key takeaways
- John Tregoning, an expert at Imperial College London in the UK, says the so-called “five-second rule” is a myth.
- When moist foods, such as watermelon, fall onto hard surfaces like tile, bacteria transfer almost instantly.
- Even if bacteria have remained on a countertop for up to 24 hours, food that falls there can still be contaminated immediately.
- Experts recommend throwing food away once it hits the floor, since rinsing it with water alone can’t guarantee that it’s clean or safe.
If you accidentally drop freshly prepared food on the floor, does that saying you’ve heard since childhood immediately pop into your head: “If you pick it up within five seconds, it’s still safe to eat”? Many people quickly pick it up, rinse it off, and put it straight into their mouths. If this is something you usually do, it may be time to take note. John Tregoning, a professor of vaccine immunology at Imperial College London, recently shared some heartbreaking news: the so-called “five-second rule” has no scientific basis at all. Citing three medical studies on bacterial transfer, he confirmed that bacteria have already transferred the moment food touches the floor.
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Myth busted: Bacteria transfer in an instant
The research team tested different foods, including bread, buttered bread, watermelon, and gummy candy, dropped onto surfaces made of tile, stainless steel, wood, and carpet. They found that bacteria transfer almost immediately.
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The riskiest combination is food with high water content landing on a hard surface. In other words, if you accidentally drop a juicy piece of watermelon on kitchen tile or a stainless steel countertop, it will pick up bacteria faster than you can bend down to retrieve it.
Hidden danger: Bacteria can survive on surfaces for up to 24 hours
Another test involving dropped cooked sausage was equally surprising. The study showed that even if bacteria had been on a countertop for hours, food would still be contaminated the moment it fell there.
John Tregoning explains that if a piece of raw chicken carrying bacteria was left on the kitchen counter, and you dropped a piece of bread in the same spot two hours later, the bread would still pick up the bacteria. Worse still, these bacteria can survive on surfaces for up to 24 hours, posing an invisible health risk.
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Is rinsing dropped food with water enough to make it safe?
When food falls on the floor, many people’s last resort is to “rinse it with water.” Yet John Tregoning admits that rinsing with clean water alone simply can’t guarantee that food is clean. This is especially true if you have pets at home: your dog may have tracked dirt from outdoors into the house hours earlier, and these invisible hazards certainly can’t be washed away with water alone.
POPBEE’s editors believe that while it is painful to watch good food go to waste, the small pleasure of eating it isn’t worth risking gastroenteritis or food poisoning.
The height of summer is also peak season for bacterial growth, so consider breaking this little habit starting today. The next time your food “makes a run for it,” it is best to bite the bullet and toss it in the trash to protect your digestive health.
Aside from this article, the following recent reports are also worth checking out:
- Your Weight-Loss Enemy Might Actually Be the Weather: That Sudden Spike in Appetite Could Be Seasonal Depression at Work
- No Need to Cut Carbs! South Korea’s Viral MZ Diet Blood Sugar Method Means You Don’t Have to Suffer Through Fasting Anymore
- Stop blaming yourself for eating too much: this 30‑second cracker test reveals if you’re actually “easy to gain weight” — even Namkoong Min’s genes say yes
