Contains BioResponse DIM®, a unique formulation containing pure diindolylmethane, an indole. Indoles are found in cruciferous vegetables such as broccoli, cabage, cauliflower and Brussels sprouts. BioResponse DIM® is a stable, bioavailable form of DIM, made possible through a proprietary delivery system.* The formula is co-solubilized with phosphatidylcholine, and microencapsulated in starch particles. Unlike indole-3-carbinole (I3C), patented BioResponse DIM® is highly stable and requires no conversion in the stomach.