See our summary of Studies Showing Adverse Effects of
Isoflavones for ample proof of the dangers of adding phytoestrogens (isoflavones) to common foods.
What happens is, you eat the soy, (and I'm really simplifying) but your body mistakes
these isoflavones for natural estrogen, and so as it flows through you, in your blood, it binds, or latches to your bodies estrogen receptors.
Khani et al also found that women with PCOS who took 36 mg / day of soy
isoflavones for 3 months saw reductions in LDL as well as triglycerides, LH, testosterone and DHEAS.
In fact, some have shown benefits, such as a 2010 study on menopausal women, who were administered soy
isoflavones for two years, which concluded that «soy and soy isoflavones may provide a mild benefit to hot flashes, lipids, and bone health for some menopausal women» (Clinical outcomes of a 2 - y soy isoflavone supplementation in menopausal women Am J Clin Nutr February 2011 93: 356 - 367)
Not exact matches
Soybeans are full of
isoflavones, the phytochemical that may be responsible
for soybeans» ability to lower cholesterol and reduce cancer risk.
Soy milk is widely consumed
for its health benefits linked to the anti-carcinogenic properties of phytonutrients present in the milk known as
isoflavones.
«
Isoflavones in food associated with reduced mortality
for women with some breast cancers.»
Connie Weaver, a Purdue University nutritionist and director of that institution's Botanicals Research Center
for Age Related Diseases, first became interested in soy
isoflavones in 1999.
Half of the women were randomly assigned to take a daily 50 mg / d soy
isoflavone supplement daily
for 12 weeks.
Still, the evidence
for isoflavones» role in cancer is mounting and must not be dismissed as insignificant in cancer research.
Since the presence of phytoestrogen containing sources (i.e. soy protein and isolated
isoflavones) has been found to influence atherosclerosis and lipoprotein metabolism in various rodent models (7 - 13), the use of purified Western - type diets provides a clean «reagent»
for inducing this disease.
Also, menopause increases a woman's risk
for developing osteoporosis (significant bone loss) and some studies suggest that a proprietary extract of red clover
isoflavones may slow bone loss and even boost bone mineral density in pre and peri-menopausal women.
It took only 45 mg daily of
isoflavones in premenopausal women to exert significant biological effects including reduction in hormones needed
for adequate thyroid function.
Scientists have known
for years that
isoflavones in soy products can depress thyroid function, causing autoimmune thyroid disease and even cancer of the thyroid.
But where it's the genestein the other types of soy
isoflavones can be helpful
for modulating, yes, receptor sites.
Results of a study recently presented at the Society
for Endocrinology annual conference in Edinburgh found soy
isoflavones to be as effective in preventing osteoporosis as more expensive pharmaceutical drugs.
Isoflavones can compete with estrogen
for the same receptor sites thereby decreasing the health risks of excess estrogen.
Before taking more that 100 to 160 mg of any type of
isoflavone (as recommended), consult an expert
for further information.
As has been suspected by many in the natural health community
for a while, research from the University of Illinois has confirmed that the concentration of soy
isoflavone in supplements may help drive tumor growth in women with estrogen - receptor positive breast cancer.
Intake of
isoflavone is beneficial particularly
for women who are already on the menoupausal stage.
The
isoflavones found in soy have estrogen - like effects in the body that can assist in bringing the hormones responsible
for menopause symptoms back to their correct levels.
The phytoestrogens known as
isoflavones that are found in red clover are believed to be responsible
for its beneficial effects.
On the other hand, a study conducted by researchers at the University of Guelph had 32 men eat low or high levels of
isoflavones from soy protein
for 57 days, and found that it didn't affect semen quality.
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.
Just as research on glucosinolates helped to spark interest in cruciferous vegetables as potential goitrogenic foods, research on
isoflavones helped to sparked interest in soybeans
for this same reason.
The only way to make soy milk palatable is to remove the very toxins, the
isoflavones, that the food industry has promoted as beneficial
for preventing cancer and lowering cholesterol.
The potential of
isoflavone intake to negatively impact thyroid function has been investigated by researchers
for two reasons.
The
isoflavones are also responsible
for the thyroid - depressing effects of soy products, not just in highly artificial products like soy protein isolate, but also in more traditional ones like tofu.
Now here's my question
for you, if I'm getting non-GMO, soy lecithin, which does contain some
isoflavones, but not as much, am I really doing a bad thing to my body?
Soy
isoflavones are also found to provide various health benefits
for postmenopausal women - there is also numerous studies done on this subject as well.
[3] At this point, there seems to be much more studies which find soy
isoflavones to have beneficial effects
for bone density.
Soy
isoflavones come from the soy bean, and it provides various health benefits including providing relief
for menopause symptoms, protects against breast cancer, and also has a favorable effect on bone mass
for postmenopausal women.
They concluded that the soy
isoflavone extract exerted favorable effects on vasomotor symptoms and good compliance, providing a safe and effective alternative therapeutic
for postmenopausal women.
For example, one study done at the Schools of Public Health and Medicine at the University of North Carolina concluded based on their study results that a soy
isoflavone - rich supplement appears to have little or no effect on bone in young adult women with normal ovarian function during the course of their one year study.
See: Interaction of estrogenic chemicals and phytoestrogens with estrogen receptor β Soy
isoflavone genistein has about 4 % of 17β - estradiol's affinity
for estrogen receptor α, responsible
for estrogen's feminizing effects, and 87 % of its affinity
for ERβ, which acts as a tumor suppressor.
For comparison, the total
isoflavone content in mg in 100 g of some soy foods: tempeh 60.61 edamame 48.95 tofu 30.41 soymilk 10.73
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.
Speaking to a reporter
for Science News, Dr. Pepine said: «There are a lot of women taking these things (
isoflavone - rich products), without any direct evidence that they're beneficial.»
Day 14 — Eat Edamame
for Postmenopausal Health Edamame and other soy based foods, such as tofu, contain
isoflavones which mimic the hormone estrogen in the body.
High levels of soy
isoflavones — plant estrogens found in products like soy milk and soy nuts as well as many menopausal supplements — put women at risk
for cardiovascular disease.
Soy protein powders also may be hugely beneficial
for menopausal women,
for the
isoflavones can reduce hot flashes.
It is a massive achievement that a Committee of a major European government has examined soy products and
isoflavone supplements in the face of heated denials of soy processing interests that either there are no estrogens in soy products («our processing removes the toxins» has been a favorite war cry) or that they are beneficial («why complain, they are good
for you» has been another).
Many studies are investigating various phytochemicals and their potential
for cancer prevention -
for example: Phytochemicals (tannins) in red raspberries (Ellagic Acid) Polyphenols (catechins) in tea; Carotenoid (beta carotene and lycopene) in carrots and tomatoes; Indoles in cabbage and broccoli;
Isoflavones in soybeans and other legumes.
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.
Myth: Soy estrogens (
isoflavones) are good
for you.
study showed «no significant correlation between soy product as well as soy
isoflavone intake and serum IGF - 1 or IGFBP - 3 levels after controlling
for age, total energy, percent body fat, and education level. . .»
For every certain amount of
isoflavones that you take in that are natural and part of the whole food complex, you have a reduced risk of recurrence.
Although soy has been known to suppress thyroid function
for over 60 years, and although scientists have identified the goitrogenic component of soy as the so - called «beneficial
isoflavones», the industry insists that soy depresses thyroid function only in the absence of iodine.
However, there is a general thesis that because of the potential
for synergistic effects, human exposure to all endocrine disrupters, such as the soy
isoflavones, requires urgent reduction (8).
The soy
isoflavones disrupted the menstrual cycle during, and
for up to three months after, administration.