By longitudinal mixed - model regression analysis, bone mineral density increased 0.26 % per 1 mg
of isoflavone intake per year.
The potential
of isoflavone intake to negatively impact thyroid function has been investigated by researchers for two reasons.
This rate
of isoflavone intake is much greater than that shown in adult humans to alter reproductive hormones.»
Not exact matches
Isoflavones have been shown to slow the growth
of breast cancer cells in laboratory studies, and epidemiological analyses in East Asian women with breast cancer found links between higher
isoflavone intake and reduced mortality.
The Cambridge volunteers ate 45 milligrams
of isoflavones a day — about a third or a quarter
of the typical
intake of the Japanese — and it seems likely that the more you eat, the greater the protection.
The probable benefits
of bioflavonoids themselves have also been demonstrated, such as the low mortality rates from prostate cancer in Asian men compared to Western countries, which may be because
of higher
intake of isoflavones.»
Intake of isoflavone is beneficial particularly for women who are already on the menoupausal stage.
According to some research, regular
intake of soy foods has feminizing effects in men due to estrogen - like molecules found in soybeans called
isoflavones.
For instance, a study conducted by scientists at Harvard University analyzed the semen
of 99 men, and compared it against their soy and
isoflavone intake during the 3 previous months.
Since soybeans contain approximately 3.5 milligrams
of isoflavones per gram
of protein, and since one cup
of cooked soybeans contain about 29 grams
of protein, we're talking about
intake of approximately 100 milligrams
of isoflavones from 1 cup
of cooked soybeans, or an amount about 40 % less than the supplemented amount that was found to have no impact on thyroid function.
These studies — which include analysis
of the
isoflavones genistein, daidzein, malonylgenistin, and malonyldaidzin — show a limited impact
of soy food
intake on thyroid function, even when soy
isoflavones are consumed in supplement form at levels higher than expected from food.
During the study, average daily
intake of soybean was 39g, and
intake of isoflavones was 8 mg.
In one study performed at the Seoul National University in Korea, 34 young women were studied to investigate the effect
of soybean and
isoflavone intake on bone mineral density and its change among young Korean women over a period
of 2 years.
High dietary
intake of soy
isoflavones was associated with lower risk
of recurrence among post-menopausal patients with breast cancer positive for estrogen and progesterone receptor and those who were receiving anastrozole as endocrine therapy.
Similarly, a Japanese population study
of over 75 thousand men and women found a decreased risk
of lung cancer among people who consumed soy products on a regular basis (
Isoflavone intake and risk
of lung cancer: a prospective cohort study in Japan.
RESULTS: «No significant effects
of soy protein or
isoflavone intake on T (Testosterone), SHBG (Sex Hormone Binding Globulin), free T (Testosterone), or FAI (Free Androgen Index) were detected regardless
of statistical model.
For instance, a study conducted by scientists at Harvard University analyzed the semen
of 99 men, correlated it with their soy and
isoflavone intake during the 3 previous months, and found that both
isoflavone and soy
intake were associated with a reduction in sperm count.
Two or more servings
of such foods would provide 60 - 100 mg
isoflavones per day, an amount that provides the estrogen equivalent
of the contraceptive pill2 and one that clearly poses dangers after only a brief period
of daily
intake.