Soy isoflavones found in soy foods may increase fertility by binding to estrogen receptors on cells, inducing ovulation and increasing chances of pregnancy. Excessive consumption of soy foods may reduce fertility, but moderate intake is not harmful.
Soy foods have been consumed for thousands of years and many studies report a number of health benefits associated with soy intake. Research has proposed a connection between soy isoflavones and fertility, suggesting that consuming soy products such as soy milk or tofu may increase the chances of conception. Soy isoflavones found in soy foods may be able to bind to estrogen receptors on cells in the body, possibly inducing ovulation and increasing the chances of pregnancy. Although soy isoflavones and fertility have been positively correlated in numerous studies, some research suggests that excessive consumption of soy foods may reduce fertility.
Some studies involving nutrition and its impact on fertility show that soy isoflavones, chemical compounds in soy foods, may help increase fertility in some people by stimulating estrogen and ovulation. Soy isoflavones and fertility research show that soy acts as a phytoestrogen, binding weakly to estrogen receptors on cells. Researchers believe that soy isoflavones are similar in structure to natural estrogen, a hormone responsible for secondary sex characteristics in females that aids in ovulation and fertility in women. By binding to estrogen receptors in the brain, the cells supposedly release more follicle stimulating hormone, which aids in the maturation of follicles, releasing estrogen and activating luteinizing hormone to stimulate ovulation.
When women have trouble conceiving, some doctors and dieticians recommend soy foods for their isoflavone content. Consuming soy foods appears to have a greater effect on increasing fertility in women, however some research suggests it may be beneficial for men. These studies of soy isoflavones and fertility in men appear to have mixed results, yet still raise the possibility of helping some men increase sperm quality. The exact effects are currently unknown, and more research is needed to determine if soy can be used in future fertility treatments.
Excessive consumption of soy foods has been linked to decreased fertility in some studies. Because soy isoflavones are similar in structure to estrogen and help release excess estrogen, it has also been proposed that soy may increase the risk of breast cancer. These studies are also conflicting, with no conclusive answers suggesting that the avoidance or moderate intake of a diet of soy foods such as soy milk, tofu, or soy sauce is harmful.
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