DIM (diindolylmethane), is a food-based compound found in cruciferous vegetables like broccoli, cabbage, cauliflower and Brussel’s sprouts.Studies have shown that it has the ability to reduce the risk of certain cancers, especially those influenced by excessive estrogen levels, such as breast, uterine and prostate.IM (diindolylmethane), is a food-based compound found in cruciferous vegetables like broccoli, cabbage, cauliflower and Brussel’s sprouts.