Nature's Way, Femaprin, Vitex Extract, 60 CapsulesSupports a Healthy Menstrual Cycle Fortified with Vitamin B 6 Once Daily Dosage Standardized to 0. 6% Agnusides Dietary Supplement Femaprin is a unique formula that combines a standardized Vitex (Chaste Tree) extract with Vitamin B 6 to help support a healthy menstrual cycle and reduce periodic discomfort. Femaprin is designed to help alleviate the symptoms and discomfort of premenstrual syndrome such as bloating, breast tenderness and mood changes.