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A hallmark study published in JAMA by Dr. Henry P. Barham shows that your ability to taste bitterness strongly correlates with your ability to clear viral infection and explains why some struggle with viruses and others clear with a quick sniffle.
The study showed that bitterness reflects the presence of a vital receptor in your upper respiratory tract that signals your 'innate' immunity to rev up and fight off infection before it enters your bloodstream.
Dr. Barham is a board-certified ear, nose, and throat (ENT) physician who works as a dedicated rhinologist (nose, sinus, allergy, endoscopic sinus, and skull base surgery) at Sinus and Nasal Specialists of Louisiana, LLC.