2. Pregnant women, pregnant women and lactating women belong to special groups. Soybean isoflavone is not recommended for this kind of people. Soybean isoflavone is a phytoestrogen. If taken, it will enter the fetus through the placenta, which will affect the development of the fetus. For example, feminization may occur in vaginal gland diseases of male and female fetuses.
3. Breast hyperplasia, breast cancer, uterine leiomyoma and lobular hyperplasia are all caused by the increase of estrogen. They shouldn't eat soy isoflavones. Otherwise, the disease will become more serious and even seriously affect the recovery of the disease.
Extended data
Nutritional value of soybean isoflavones
1, genistein contains 5.7.4 three phenolic hydroxyl groups, and daidzein contains 7.4 two phenolic hydroxyl groups. Phenolic hydroxyl, as an oxygen donor, can react with free radicals to generate corresponding ions. Soybean isoflavone also has a clear antioxidant effect on the whole animal, and soybean isoflavone extract also has obvious inhibitory effect on the increase of peroxidation level and the decrease of antioxidant enzyme activity in mice induced by adriamycin.
2. Isoflavones are typical phytoestrogens. Soybean isoflavones can not only replace estrogen to combine with ER to play an estrogen-like role, but also interfere with estrogen to combine with ER, showing an anti-estrogen-like effect. The estrogenic activity or antiestrogenic activity of soybean isoflavones mainly depends on the hormone metabolism of the subjects themselves.
3. For those with high estrogen level, such as young animals, estrogenic animals and young women, it shows anti-estrogen activity; For those with low estrogen level, such as young animals, ovariectomized animals and menopausal women, it shows estrogen activity. The estrogen-like effect of soybean isoflavone has certain preventive and therapeutic effects on many diseases related to hormone withdrawal in elderly women, such as elevated blood lipid, atherosclerosis and osteoporosis.
4. Soybean isoflavones can improve the symptoms of myocardial ischemia, dilate blood vessels, inhibit platelet aggregation, reduce the contents of cholesterol and triglycerides in blood, and have anti-arrhythmia effects. In the endocrine system, isoflavones mainly have estrogen-like effects, which have dual effects of excitation and inhibition like estrogen, and some isoflavones can also affect bone resorption, so they are beneficial to the treatment of bone diseases.
5. Epidemiological studies show that soybean, as the only dietary source of G (genistein), may be related to the relatively low incidence of breast cancer, colon cancer and prostate cancer in China and Japan. The total isoflavone level in Japanese plasma is 7- 100 times higher than that in westerners.
Baidu encyclopedia-soybean isoflavone