Swanson Valerian is a dietary supplement in the form of capsules containing valerian. The preparation is intended for use as a supplement to the diet of adults. Learn how valerian works Valerian ( Valeriana officinalis ), also known as valerian, is naturally involved in maintaining physical and mental well-being. It also helps you cope with everyday stress. In addition, it is used to achieve relaxation and sound sleep. The Swanson Valerian food supplement package contains 100 capsules.