Too much isoflavone supplementation is not recommended for people with fibroids. Isoflavones are estrogenic substances found in plants. For example, the usual drink of soy milk, eat tofu, soybean skin and so on. Uterine fibroids are an estrogen-dependent disease, so an increased intake of estrogen may be one of the causes of uterine fibroids or cause them to increase in size. So if fibroid patients take extra isoflavone supplements, then there is a possibility that the hormone level will be elevated and stimulate the fibroid to enlarge. It is best to go to the hospital in time for treatment of fibroids under the guidance of a doctor.