Horsetail (Equisetum arvense ), named for the plants resemblance to the tail of a horse, has graced the earth for centuries. Native American, Ayurvedic, traditional European and contemporary herbalists alike recognize the benefits of this ancient herb, traditionally using horsetail to support urinary tract health.* Alvita Horsetail Tea is made with premium-quality, organic horsetail, and produces a mild, herbaceous flavor and aroma. Certified Gluten-Free by NSF. Certified Organic by QAI.