This is a very effective recipe of Giardiasis treatment with birch.
Birch (Betula) has traditionally been used in medicine. Drug from birch leaves and buds have been used for treatment of avitaminosis, inflammation of the bladder, atherosclerosis, chronic kidney disease, as well as a choleretic and expectorant. Also birch has long been used as a remedy for intestinal parasites.
Here are two recipes: