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  01:16

  How Fend is keeping our lungs Clean &...

  How Fend is keeping our lungs Clean &...

  As David explains, our upper airways keep our lungs clean and humidified. Some simple steps are to be aware of nose breathing, avoiding cold dry and dirty air... all is well! Unfortunately, we mouth breathe about 50% of the time today. Why? One reason is that 81 million Americans have rhinitis. T...