Eagle Defence AdaptMaintain healthy immune system function Support immune system to fight illness Antioxidant Reduce free radicals formed in the body Withania is included as a rejuvenative tonic and provides assistance with convalescence, as used in traditional Ayurvedic medicine. Echinacea root is traditionally used in Western herbal medicine to: reduce the severity of common cold symptoms, including sneezing, runny nose, cough, sore throat and feelings of malaise.