KSM-66 Ashwagandha has been to: Help reduce stress, anxiety, cortisol levels, and stress-related food cravings. Help promote enhanced memory and cognitive function. Help promote endurance, strength, muscle size, and muscle recovery rate. Ashwagandha (also known as “Withania Somnifera”) is an adaptogen herb that is widely used in ancient Ayurvedic and traditional medicine. When it comes to the ingredient itself, KSM-66® Ashwagandha is the most bioavailable well studied, and effective version of Ashwagandha available.