Olbas Oil or Eucalyptus oil.
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Catarrh is produced to rid your body of pathogens, infections which enter the body through one of the 3 main interfaces. E.g the respiratory system. When the liver and kidneys cannot kill the pathogen, catarrh is produced to trap the disease, then it can be blown out through the nose, or swallowed and destroyed by stomach acid. When the bacteria pathogens become concentrated and trapped in cattarh, it may appear thick and coloured. It may also develop a smell due to the dead pathogens caught up in it. Hope this helps.
Herb Worth was born May 2, 1847.
Herb Meadow was born on May 27, 1911, in New York, USA.
Herb Shriner was born on May 29, 1918, in Toledo, Ohio, USA.
Herb means "plant", thus all plants are herbs. What you may be trying to ask is, "is banana leaf considered a medicinal herb?"
Herb Foster was born on May 14, 1936, in Winnipeg, Manitoba, Canada.
Herb Muller died on May 18, 1995, in Los Angeles, California, USA.
Jacques Herb was born on May 28, 1946, in Rotterdam, Zuid-Holland, Netherlands.
Herb Hash died May 20, 2008, in Culpeper, VA, USA.
Herb Kelly died May 18, 1973, in Torrance, CA, USA.
Herb Hickey died on May 25, 2002, in Sunland, California, USA of brain cancer.