Horsetail (Equisetum arvense) is a plant belonging to the Equisetaceae family. It is traditionally valued in herbal practices and grows in Northern Hemisphere. Various parts of the plant have historically been used in herbal preparations.

In traditional herbalism, horsetail has been included in teas, tinctures, and other herbal preparations. The herb has appeared in historical herbal texts and continues to be referenced in modern herbal traditions.

Horsetail is widely searched for its potential benefits, particularly for hair, skin, and nail support. Its naturally occurring silica content has attracted interest in research exploring its role in connective tissue, although its use remains grounded in traditional herbal practices.