KSM-66® is the highest concentration Ashwagandha root extract available. It is created using a “clean extraction technology” through which no alcohol or harsh chemicals are used in the process. KSM-66® is supported by the most extensive set of research studies and clinicals trials of any Ashwagandha brand. So you can be sure you’re getting the purest, most concentrated, most clinically validated extract every time. That’s the promise of KSM-66®.