Silica 500, 50 mg 200 tabs from World OrganicSilica 500 Guaranteed Potency 10% Silica from Springtime Horsetail. Horsetail (Equisetum Hippocastanum) helps facilitate calcium in the body and has a high silica content. Silica is primarily used to help heal broken bones, arthritis, kidney and urinary tract disorders, hair loss and is considered a natural diuretic and astringent. This Horsetail herb is micro milled and water treated to retain its natural nutrients (including flavonoids) to