hangzhou greensky biological tech.co.,ltd, a leading manufacturer and supplier of herb active ingredients in china, supply high-quality subjected products with very competitive price and good service. now we are supplying: horsetail extract botanical source: equisetum arvense; appearance:yellow powder; specs available:silica, by hplc 7%; active compounds: horsetail is very rich in silicic acid and silicates, which provide approximately 2-3% elemental silicon. potassium, aluminum, and manganese along with fifteen different types of bioflavonoids are also found in the herb. the presence of these bioflavonoids are believed to cause the diuretic action, while the silicon content is said to exert a connective tissue-strengthening and anti-arthritic action. remedies for:astringent, diuretic, vulnerary, diaphoretic. horsetail is useful for: 1.brittle nails; 2.osteoarthritis; 3.osteoporosis; 4.rheumatoid arthritis; 5.water retention.