In middle May, KINGHERBS researchers went to the mountain near her factory location, Yongzhou Hunan, and dug out about 1 kilo of wild stephania japoninca root, we tested the content of cepharanthine by HPLC, the results are 0.180% in fresh root , 0.011% in half-dry stem and leaf.
We would test the content in dried root later. If you are interested in the tests, please contact us for HPLC Chromatography. And we appreciate your share of the test results if there is stephania japoninca grows in your location.