Soy isoflavones are not recommended for patients with uterine fibroids. Soy isoflavones are flavonoids, which are a type of product formed in the growth of soybeans, extracted from plants, and have a similar structure to estrogen, so soy isoflavones are also known as phytoestrogens, which can play the role of estrogen. Modern medicine proves that the high sensitivity of fibroid tissue locally to estrogen is an important factor in the occurrence of fibroids, and is also an important stimulus for the growth of fibroids. Soy isoflavones are phytoestrogens that, if taken frequently, may stimulate the growth of fibroids. For women with fibroids, it is generally not recommended to take foods containing estrogen and progesterone, including soy foods, of which soy isoflavones are one, and to eat as little dried soybeans and soy milk as possible, and to eat less royal jelly and other substances containing estrogen.