DIM (Diindolylmethane) is naturally synthesized in the body from a compound known as indole-3-carbinol, which is found in cruciferous vegetables such as cauliflower, cabbage, and broccoli. Research has found that DIM acts as a mild aromatase inhibitor helping to reduce the rate at which testosterone is aromatized into estrogen and thus to support a healthy balance of testosterone and estrogen.