Valerian root has long been used to promote better sleep by calming the mind to relieve stress and tension. You'll be able to fall asleep and stay asleep, which is essential for good health. The valerian root used in Solaray Valerian Root Extract 50 mg has a guaranteed potency of 400 mcg or 0.8 percent valerenic acid, the active component of this plant that helps to calm and relax.