The plant contains several substances which can be used medicinally. It is rich in the minerals silicon (10%), potassium, and calcium, which gives it diuretic properties. It is prescribed to care for cartilage, tendons, and bones and also polyps, epistasis, and bleeding[citation needed]. The buds are eaten as a vegetable in Japan and Korea in spring time. All other Equisetum species are toxic. In polluted conditions[citation needed], it may synthesize nicotine.^[1]

It was also once used to polish pewter and wood (gaining the name pewterwort) and to strengthen fingernails. Also as an abrasive: it was used by Hurdy-Gurdy players to dress the wheels of their instruments by removing resin build up.^[2]

In herbalism it is used to treat kidney and bladder problems, gastro-enteritis, and prostate and urinary infections, and is particularly indicated for enuresis in children. Externally it is used for chilblains and wounds.^[3]

It is used in Biodynamic farming to make the "silica" soil preparation. (BD 508) Equisetum in particular because silicon is used to reduce the effects of excessive water around plants that would lead to fungus. It is the high percentage of silica in the plant that works on lowering the impacts of moisture. ^[