Yes, Blowing Candles On Your Birthday Cake Spreads Bacteria - Turns out germophobes may be right about the whole “blowing out the candles” thing.
A recent study in the Journal Of Food Research found that blowing out the candles produces 1,400% more bacteria in cake icing than in icing not blown on.
The report, titled Bacterial Transfer Associated with Blowing Out Candles on a Birthday Cake, found that more than 2,000 “moisture particles” are exhaled when blowing out candles, each particle large enough to carry bacteria and viruses.
Some of the bacteria identified in the study include staphylococcus, corynebacterium, haemophilus and neisseria.
Instead of baking real cakes, researchers at Clemson University in South Carolina, United States, spread cake frosting on polystyrene wrapped in aluminium foil, then blew out the candles on some, and not on others, in order to compare bacterial counts.
Before blowing out the candles, researchers ate pizza to get in a party mood.
“We also wanted to simulate a birthday party,” said study co-author Paul Dawson.
“We thought it might help the salivary glands get going.”
But Dawson said he’s personally not too bothered by the findings.
“It’s not a big health concern in my perspective,” he said.
“In reality if you did this 100,000 times, then the chance of getting sick would probably be very minimal.”
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