|Dosage: ||6 grams of the herb per day for internal use.6 A tincture can also be used at 2 teaspoons (10 ml) three times per day. A horsetail tea may be made by boiling 2–4 teaspoons of the herb in one cup (250 ml) of water for five minutes. Steep the tea for an add|
|Description: ||The presence of these flavonoids, as well as saponins, is believed to cause the diuretic effect, while the silicon content is thought to exert a connective tissue-strengthening and anti-arthritic action.|
|Horsetail is rich in silicic acid and silicates, which provide approximately 2–3% elemental silicon. Potassium, aluminum, and manganese, along with fifteen different types of flavonoids, are also found in this herb. The presence of these flavonoids, as well as saponins, is believed to cause the diuretic effect, while the silicon content is thought to exert a connective tissue-strengthening and anti-arthritic action. Some experts have suggested the element silicon in horsetail is also a vital component for bone and cartilage formation. Anecdotal reports suggest that horsetail may be of some use in the treatment of brittle nails.|
The Canadian Health Protection Branch requires supplement manufacturers to document that their products do not contain the enzyme thiaminase, found in crude horsetail, which destroys the B vitamin thiamine. Since alcohol, temperature, and alkalinity neutralize this potentially harmful enzyme, tinctures, fluid extracts, or preparations of the herb subjected to 100°C temperatures during manufacturing are preferred for medicinal use.