Valerian root has been the primary herb of choice for supporting restful sleep since the 9th century. Modern research has confirmed this traditional use, and has identified valerenic acid, a component of the essential oil, as primarily responsible for its relaxing effects. These compounds are highly soluble in alcohol extracts. Planetary Formulas Valerian Root Fresh Plant Fluid Extract is carefully prepared from freshly harvested, organically cultivated roots, to prevent the degradation of valerian's sensitive constituents.