KSM-66 Orgainic Ashwagandha The root of ashwagandha has been used in Ayurvedic medicine for over 3000 years for a variety of purposes, including as a tonic and adaptogen. KSM-66 is a full-spectrum extract of ashwagandha shown in clinical research to help alleviate the effects of stress and tension, reduce the stress hormone cortisol, and help reduce emotional eating related to stress.*