Horsetail is a nonflowering perennial weed. The shoot of this plant is a brownish stem with a cone-like structure at the top. When the plant dries out, silica crystals form within the stems, resulting in a type of "bottle brush."
As a folk remedy, horsetail was often used to stop bleeding wounds and cuts, as mouth rinse, and to alleviate kidney problems. Because of the abrasiveness of the dried weed, it was often used to scrub pots and to polish metal, especially pewter.
Horsetail extract contains silica, which forms collagen and helps to heal broken bones. It is being used today as a treatment for osteoporosis. Horsetail has also been used to treat those with overly heavy menstrual flow.
Horsetail extract is also a diuretic and can help with kidney disorders, urinary tract infections, incontinence, prostate problems and even bed-wetting. Topically, horsetail has been shown to treat burns, rheumatism and sprains. It's also been helpful for those suffering from emphysema.
As an extract, horsetail is usually given three times per day at 1 to 4 ml. A tea can also be made of the dried herb by using 2 to 3 teaspoons in a cup of boiling water and letting steep for 10 minutes. This can be taken up to three times daily as well.
Horsetail extract should not be taken over an extended period of time. There may be drug interactions, so make sure you consult with your doctor before beginning any horsetail treatment.