APS II® with White Willow Bark [Nervous] provides nutrients that aid proper nervous system function. White Willow Bark contains salicin, a compound chemically similar to salicylic acid used in aspirin. Salicin appears to help prevent the production of prostaglandins responsible for discomfort actions. Valerian root provides additional nervous system support, including promoting feelings of calm and restful sleep. APS II with White Willow Bark is a source of calcium and magnesium. Its ingredients include: White willow bark Lettuce leaves Valerian root Capsicum fruit Take 2 capsules with a meal three times daily.