Tea made from the Downy birch (Betula pubescens), which abounds in Iceland, is extraordinarily wholesome and tasty and well suited for daily use. Birch tea is diuretic and anti-inflammatory. Birch is believed to stimulate the liver, cleanse the blood and be good for kidney problems. It has been used to combat infections of the urinary tract. Birch is commonly used for all kinds of rheumatism, to combat high blood pressure and the formation of oedemas.