Market analyst: recent research confirms that the main cause of bad breath is bacteria build-up on the tongue. The research also concludes that tongue scrapers, when used properly, can eliminate up to 40% of the bacteria from the tongue. As the effectiveness of tongue scrapers becomes more widely known, the market for less effective
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sorry but your question is not clear
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yes there are many germs present in our tongue and the reason for bad odour is also such results
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