There are different forms of ginseng, one of which is Siberian ginseng. Siberian ginseng is not the same herb as American or Panax ginseng. The quality of Siberian ginseng products vary a lot. Siberian ginseng is often misidentified or contains "adulterants," which are other ingredients that do not contribute to the benefit of the product, but take up space in the product. Silk vine is a common adulterant of Siberian ginseng. Our Siberian ginseng is 100%, with no additives or adulterants whatsoever.