A. Myomin is especially good for fibroid cysts in the breast, uterus, and ovaries, as some of the herbs can help promote shrinkage of tumors. It has also been effective for cysts in the thyroid, kidney, and liver. Myomin can also regulate excess estrogen and induces more interferon in the system, which helps activate natural killer cells. Myomin has actions that differ from DIM; therefore, some women choose to take them together for a more aggressive approach. Of the two, DIM is the stronger metabolizer of estrogen.