These are our favorite top ayurvedic herbs or rasayanas used in the system of Ayurveda to energize and deeply nourish reproductive health as well as digestive, immune and nervous system functions. They have been a part of the East Indian Vedic system of medicine for thousands of years, one of the oldest forms of healthcare in the world. The use of Ayurvedic herbs and preparations dates back to one of the oldest healthcare systems in the world, the traditional Indian medicine of Ayurveda.