The nettle extract is a dried whole grass extract of the nettle plant, which contains flavonoids, lignans, steroids, lipids, organic acids, proteins, tannins, chlorophyll, alkaloids and polysaccharides. And other ingredients. It has anti-rheumatic, hypoglycemic, and treatment of benign prostatic hypertrophy and other biological activities. Nettle is derived from a variety of plants of the genus Urtica L., which are annual and perennial herbs. There are about 35 species of urtica in the world http://www.tcl-ingredients.com/hot-selling-products/nettle-extract-powder.html