Ashwagandha (Withania somnifera) is one of the most highly respected adaptogenic tonifiers of the 5,000-year-old Ayurvedic herbal tradition of India. Adaptogens are a class of substances said to help the body adapt to physiologic and psychological stresses and changes. In this regard, it is often compared with Asian Panax Ginseng. Planetary Formulas formulator Michael Tierra, L. Ac., was instrumental in bringing this key botanical to the United States.