Vitex (Chaste Berry) ExtractVitex Extract is unique because each capsule is standardized to provide 0. 5% agnuside, chaste berry's most significant compound. Chaste tree berry extract is a source of phytoestrogens and a popular herb among women who need extra support during premenstrual and menstrual cycles.* Vitex Extract is particularly beneficial for premenstrual stress syndrome Ingredients Chaste Tree Berry Extract standardized to 0. 5% agnusides (1. 1 mg) 225 mg Other