Birch leaf cut. 50 gr Diuretic, lithotriptic (kidney stones), anti-inflammatory, febrifuge, astringent. Recommended method of use for infusions: Pour the contents of a tablespoon into boiling water and remove from heat. Cover the container and let it rest for 8 to 10 minutes. If they are roots, barks or seeds, simmer for 2 to 4 minutes. Strain and sweeten to taste.