A dietary supplement containing an extract powder derived from the root of the ashwagandha shrub with potential antineoplastic, antioxidant, immunostimulating and anti-angiogenic activities. Ashwagandha root powder extract contains numerous alkaloids, including withanine as the primary alkaloid, and steroidal lactone withanolides. The withanolides in this agent may suppress nuclear factor-kappaB activation and nuclear factor-kappaB-regulated gene expression, potentiating apoptosis and inhibiting tumor cell invasion. Cultivated in India and North America, ashwagandha (Withania somnifera Dunal or Indian ginseng) belongs to the Solanaceae (nightshade) family.