I recently came across some very interesting articles by Dan Riegler. Dan imports resins and perfume-making materials from different countries.
He wrote about the medicinal properties of Frankincense, here:
https://apothecarysgarden.com/2018/02/28/frankincense-medicine-truth-myth-and-misinformation/
He wrote about the medicinal properties of Frankincense, here:
https://apothecarysgarden.com/2018/02/28/frankincense-medicine-truth-myth-and-misinformation/