Why Not Usnea or Kombucha Extract?
Pure Usnic Acid (as the name implies) is NOT usnea or kombucha extract but pure laboratory certified usnic acid. The reason for not using extracts is simple: they do not contain enough usnic acid. For example usnea barbata extract contains around 5 mg usnic acid in 2 droppers. Consuming a full 2 ounce bottle costing $16.99 of this extract would yield only 150 mg of usnic acid!