Valerian, Time Release [Nervous] has been used as a sleep aid for over 1,000 years. Its ability to help relax the central nervous system, promote feelings of calm, decrease levels of anxiety and stress, and enhance sleep are known to millions the world over. Unlike some prescription sleep aids, valerian is not known to cause morning grogginess and is non-addictive. Each chlorophyll-coated tablet of NSP Time-Release Valerian contains 500 mg of the finest valerian root extract, concentrated and standardized to 0.8 percent valerenic acid. Time-release technology offers a steady release of valerian for 6–8 hours, ensuring better, more restful sleep.