Boldo (Peumus boldus)
Boldo is an evergreen plant natural to South America, and used by the natives for a range of uses from gout to liver and prostate problems. Today it is recognised in the British Herbal Pharmacopoeia for its diuretic actions in particular, where it is also thought to cleanse sediment and bacteria from the biliary tract.
Boldo contains several active ingredients, including alkaloids, flavonoids and volatile oils. The major alkaloid found is called boldine, which is believed to stimulate the production of bile and act as a diuretic. Another compound found in the plant’s oil, ascaridole, has been used to fight parasites but is also quite toxic.