orsetail (Equisetum Arvense) is commonly known as bottlebrush. According to Herbs 2000, horsetail is related to plants that were around during the dinosaur era and are believed to have been as tall as 40 feet or more. In the Middle Ages, horsetail clumps were used as scouring pads because of their silicon content. Clinical European studies have shown that horsetail extract helps mend broken and fractured bones quicker, states Herbs 2000. Horsetail extract will also heal dislocated joints and pulled hamstrings and reduce osteoporosis. Growth and stability of the skeletal system are promoted by using horsetail extract. The German government agency, Commission E, regulates the use of horsetail extract as a diuretic for water retention and to treat urinary tract problems including gravel, according to Flora Health. It is also used externally to treat wounds and prevent infections.