Research suggests that valerian may be helpful for insomnia, but there is not enough evidence from well-designed studies to confirm this.
There is not enough scientific evidence to determine whether valerian works for other conditions, such as anxiety or depression.
NCCAM-funded research on valerian includes studies on the herb’s effects on sleep in healthy older adults and in people with Parkinson’s disease. NCCAM-funded researchers are also studying the potential of valerian and other herbal products to relieve menopausal symptoms.
The roots and rhizomes (underground stems) of valerian are typically used to make supplements, including capsules, tablets, and liquid extracts, as well as teas.