The Moranbong Ragwon Health Food Manufactory has developed black broad bellflower roots and their concentrated juice, which are functional foods prepared through fermentation and maturing of broad bellflower roots collected in the famous mountains in the DPRK.

Through the process of turning their colour to black, such medicinal ingredients as saponin and polyphenol are increased in the broad bellflower roots.

The foods have special effects on preventing bronchitis and other respiratory diseases and improving the immunity and metabolism.