Three indigenous varieties of Echinacea have been used medicinally for centuries on the North American continent, with widespread use in the Native American cultures for the care and healing of their people and horses. They are also now widely grown and used all over the world. The current technology and more than 350 research projects have confirmed its anti-viral and antibacterial properties, as well as its ability to stimulate the immune system. Echinacea also supports tissue regeneration after surgery or injury and additionally has been shown to have anti-inflammatory activity. Tests have shown that an orally administered form of Echinacea yields the greatest therapeutic value.