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Burning birthday candles can impair brain function, a study suggests.
People are worse at focusing and spotting changes to someone’s emotions after sitting in an unventilated room with a candle burning.
The findings led the researchers to advise those celebrating a loved one’s birthday to keep windows open when blowing out a candle.
Scientists from the universities of Birmingham and Manchester put 26 people in a candlelit room for an hour and then gave them mental tasks to complete four hours later.
People are worse at focusing and spotting changes to someone’s emotions after sitting in an unventilated room with a candle burning.
The findings led the researchers to advise those celebrating a loved one’s birthday to keep windows open when blowing out a candle.
Scientists from the universities of Birmingham and Manchester put 26 people in a candlelit room for an hour and then gave them mental tasks to complete four hours later.