Plant native to Europe, Asia, and North America.
Scientific name: Equisetum arvense.
Other Names: Equisetum.
Active Principles: Mineral salts (potassium, aluminum and manganese), especially silicic. It also contains sterols, caffeic acid and phenolic acids: cinnamic, dicafeoiltartárico and cafeoilshikímico. Abundant flavonoids, very variable depending on the origin of the plant.
Part used: Stems and leaves.