Not one of the 18 scientists interviewed for this column was willing to say that
taking isoflavones was risk free.»
In fact, nearly half (48 %) of the women
taking isoflavones experienced hot flashes compared with just 31 % of women who took the placebo!
At the end of the 2 year period, women taking a placebo versus women
taking the isoflavone supplement showed no differences in bone loss or menopausal symptoms such as hot flashes and night sweats.
You can choose not to
take the isoflavones if you wish but, when it comes to something that can potentially interact with estrogen, soy holds a specific niche.
Not exact matches
Specifically, soy protein isolates contain
isoflavones which can interact with hormones like estrogen and potentially skew hormone levels when
taken in excess.
The researchers also found women who
took soy
isoflavone supplements tended to have lower levels of testosterone, harmful cholesterol known as LDL and triglycerides, or fats in the blood, than their counterparts who received the placebo.
Half of the women were randomly assigned to
take a daily 50 mg / d soy
isoflavone supplement daily for 12 weeks.
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.
After one month of
taking 20 mg or 40 mg
isoflavones daily, 60 % of the young women had prolonged menstruation, 20 % had shortened menstruation, 17 % remained unchanged and 3 % became irregular.
Before
taking more that 100 to 160 mg of any type of
isoflavone (as recommended), consult an expert for further information.
«Women
taking soy
isoflavone tablets to alleviate hot flashes and prevent bone loss at the time of menopause might want to reconsider,» says Silvina Levis, M.D., the director of the osteoporosis center at the University of Miami's Miller School of Medicine.
Suppose you
take soy
isoflavones which contains natural estrogen, to increase your estrogen levels (the primary female hormone and counterpart of testosterone in men).
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.»
This is a powerful fact:
isoflavones have half of the ability to perform estrogenic function as they do to
take up space.
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.
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.
«Excess consumption of soy can affect thyroid function, if you have a thyroid disorder to begin with or if you're not getting enough iodine in your diet... you're unlikely to get too many
isoflavones as a result of adding soy foods to your diet — but you probably will
take in too much if you
take soy supplements in pill form.