KSM 66 Ashwagandha (500mg) with Organic Black Pepper (10mg) capsules provide the highest concentration of full-spectrum root extract currently on the market. Ashwagandha is the star herb of Ayurveda, the traditional system of healing in India. This herb has been known for centuries and in recent years studies have brought confirmation of the nutrient value of this potent herb.KSM 66 is a special extract of Ashwagandha root that took 14 years of RD to perfect. It is the ashwagandha root extract with the most comprehensive support from successful research studies and clinical trials. It also has the highest percentage of withanolides of all root-only extracts available today, with more than a 5% concentration of withanolides.