KSM-66 is a patented and full-spectrum extract of Ashwagandha. It is also the most clinically studied Ashwagandha, as over two dozen scientific studies back up KSM-66's effectiveness. Research shows that it positively impacts testosterone, strength, quality of sleep, and much more. It is undoubtedly one of the most promising botanical extracts in today's market. We have chosen KSM-66 because it provides a high concentration of Ashwagandha, directly sourced from only the primary roots. The use of roots is superior to that of leaves, as proven by human clinical evidence.Our KSM-66 Ashwagandha supplement provides 60 servings, each containing 1000mg of KSM-66.