Published February 1, 1990
List of German Commission E Monographs (Phytotherapy)
Barosmae folium, buchu leaf.
Buchu leaf consists of the dried leaves of Barosma betulina Bartl. (syn. Agathosma betulina (Berg) Pill.) [Fam. Rutaceae], as well as preparations thereof.
Buchu leaf is used for inflammation and infection of the kidneys and urinary tract, for bladder irritations, as a disinfectant of the urinary tract, and as a diuretic.
The effectiveness for the claimed applications is not documented.
Buchu has essential oil that contains diosmin and pulegone, which can cause irritation. There are no reports of cases of poisoning.
Since the claimed effectiveness has not been documented, the application of buchu leaf cannot be recommended.
The use of buchu leaf as an aroma or flavor corrigent in tea mixture is acceptable.