Diindolylmethane, better known as DIM, is a plant compound found in many common foods, like broccoli, cabbage, cauliflower and Brussels sprouts. DIM provides several health benefits, including preventing viral infections, reducing inflammation, boosting the immune system and regulating hormones.
Keeping hormones regulated in both men and women is one of the things DIM is best known for doing. Estrogen (found in both males and females) have a good and bad side, just like cholesterol. DIM helps to increase the good estrogen while working to reduce the bad estrogen. DIM also frees up testosterone in the body which may be bound up and the plant compound also acts as a natural aromatase inhibitor to help prevent breast and ovarian cancer in women.
A dietary supplement, known as Indole-3-carbinol or I3C is marketed as being a product which is converted to DIM after being taken, but studies have shown that Indole-3-carbinol supplement is very unstable and may not be converted to the desired DIM, but rather into a substance with unwanted side effects after ingesting.
Thanks to Steve Murray and the article on his personal site for showing me this.