KSM 66 is a process where extract is specially derived from the roots of the plant and not the leaves, producing a full-spectrum extract. This process does not involve the use of alcohol or a chemical solvent. KSM 66 has the highest percentage of withanolides. KSM 66 has a neutral taste and is not bitter, making it an excellent choice for use. KSM 66 is GRAS affirmed, vegetarian, safe and shelf-stable.