From Manufacturer's Label:Nugenix® Estro-Regulator is a powerful, cutting-edge supplement that can be stacked with Nugenix® Free Testosterone Booster in order to maximize results. One of the key super ingredients found in Nugenix® Estro-Regulator is Diindolylmethane (DIM), which is an aromatase inhibitor that can help support estrogen balance—a critical factor for anyone wanting hardcore gains. In vitro evidence demonstrates DIM’s anti-estrogen activity. Through its interaction with estrogen binding sites, it can help inhibit the reaction that converts testosterone into estrogen. Overall, this activity can diminish the impact estrogen has in the body!**60 capsules.Manufactured by: Nugenix®