Valerian root is a part of the valerian plant. Valerian (Valeriana officinalis) is an herb native to Europe and Asia that now grows in many other areas of the world, including the United States.

2. Valerian Root Valerian root is an herb from the valerian plant (Valeriana officinalis). Researchers believe valerian helps you sleep by increasing your brain's levels of gamma-aminobutyric acid ...