Withania Somnifera Supports Resistance to Fatigue Dietary Supplement Vegan Suitable for Vegetarians/Vegans Non GMO KSM-66 KSM-66 Ashwagandha is an extract obtained from roots. Ashwagandha has been used in the Indian tradition of Ayurveda to improve musculoskeletal function and as a tonic to improve overall health. Experimental studies demonstrate that Ashwagandha is an antioxidant that supports resistance to physical, biological, and chemical stresses and supports endurance, muscle recovery and cognitive health.