Parts used: Herb Properties Alterative, antilithic, antineoplastic, astringent, diuretic, emmenagogue, galactagogue, lithotriptic, nephritic, nutritive, vulnerary Primary nutrients Flavonoids, iodine, iron, manganese, PABA, pantothenic acid, silicon, sodium, vitamin E Horsetail is thought to aid the immune system and the nervous system because of its silica content. The nerves contain almost the same amount of silica as does the albumin in the blood. The pancreas is especially rich in silica. It is found combined with fluorine in the enamel of the teeth. Hair needs silica to grow, and it is needed as a protection for the skin and cell walls. Horsetail aids in treating urinary tract problems. It contains silicic acid, which helps with circulation of the blood. Horsetail is also credited with helping coagulate the blood and decreasing blood flow. A decoction applied externally will stop bleeding of wounds and aid in healing. It can be used as a mouthwash for mouth infections. Horsetail is often found in calcium combinations. It is helpful in building the skeletal system and improving bone structure. The silica in horsetail aids in healing bones, keeping the arteries clean, and facilitating the absorption of calcium by the body. Horsetail is known to have antibiotic properties and contributes to the overall healing process. Horsetail is also thought to help with bleeding, urinary and prostate disorders, bed-wetting, skin problems and lung disease.