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  1. #1
    Senior Member IBM's Avatar
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    Dietary soy-phytoestrogens decrease testosterone levels

    According to this study:

    Dietary soy-phytoestrogens decrease testosterone levels and prostate weight without altering LH, prostate 5alpha-reductase or testicular steroidogenic acute regulatory peptide levels in adult male Sprague-Dawley rats.
    Nutritional factors, especially phytoestrogens, have been extensively studied for their potential beneficial effects against hormone-dependent and age-related diseases. The present study describes the short-term effects of dietary phytoestrogens on regulatory behaviors (food/water intake, locomotor activity and body weight), prostate weight, prostate 5alpha-reductase enzyme activity, reproductive hormone levels, and testicular steroidogenic acute regulatory peptide (StAR) levels in adult Sprague-Dawley rats. Animals were fed either a phytoestrogen-rich diet containing approximately 600 microg/g isoflavones (as determined by HPLC) or a phytoestrogen-free diet. After 5 weeks of consuming these diets, plasma phytoestrogen levels were 35 times higher in animals fed the phytoestrogen-rich vs phytoestrogen-free diets. Body and prostate weights were significantly decreased in animals fed the phytoestrogen-rich diet vs the phytoestrogen-free fed animals; however, no significant change in prostate 5alpha-reductase enzyme activity was observed between the treatment groups. Locomotor activity levels were higher in the phytoestrogen-rich vs the phytoestrogen-free animals during the course of the treatment interval. Plasma testosterone and androstenedione levels were significantly lower in the animals fed the phytoestrogen-rich diet compared with animals fed the phytoestrogen-free diet. However, there were no significant differences in plasma LH or estradiol levels between the diet groups. Testicular StAR levels were not significantly different between the phytoestrogen-rich vs the phytoestrogen-free fed animals. These results indicated that consumption of dietary phytoestrogens resulting in very high plasma isoflavone levels over a relatively short period can significantly alter body and prostate weight and plasma androgen hormone levels without affecting gonadotropin or testicular StAR levels. The findings of this study identify the biological actions of phytoestrogens on male reproductive endocrinology and provide insights into the protective effects these estrogen mimics exert in male reproductive disorders such as benign prostatic hyperplasia and prostate cancer.
    http://www.ncbi.nlm.nih.gov/sites/en...indexed=google

  2. #2
    Senior Member IBM's Avatar
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    Re: Dietary soy-phytoestrogens decrease testosterone levels

    While all phytoestrogens are considered disruptive for male sexual function, some phytoestrogenic herbal extracts, such as damiana, are considered aphrodisiacs for women.

    The following chain of thought has been offered to explain this phenomenon: the phytoestrogens of such herbal extracts occupy estrogen receptor sites of the female body. These receptor sites are thereby closed to the woman's own estrogens. The woman's own estrogens are considered stronger than phytoestrogens. That estrogen receptor sites are occupied by weak phytoestrogens instead of the woman's own stronger estrogens tilts the balance between androgens and estrogens in favor of androgens. As the theory goes, the women will therefore feel more sexual appetite.

    In men, damiana will likely have the opposite effect. Weak phytoestrogens such as damiana do not only bind to estrogen receptor sites but also to testosterone receptor sites, so that in men, they cause overall testosterone levels to decline.
    http://www.cockatoo.com/phytoestrogen/index.htm

  3. #3
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    They see me rolling, they hating...

    Re: Dietary soy-phytoestrogens decrease testosterone levels

    going to put soy on my head!

  4. #4
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    Re: Dietary soy-phytoestrogens decrease testosterone levels

    Quote Originally Posted by squeegee
    going to put soy on my head!
    an intelligent response to a dumb post. Testosterone is good for you on the inside. But IBM likes to eat spiro. Soy is probably only a small fraction phyto estrogens. You need to guy the extract. I bet the estrogens are stuck to the protein. You can even grind up a birth control pill and put that on your head, but you will probably get gyno with your hair growth. just go with Lavender instead.
    Support instant round robbin voting (Condorcet), which elects the candidate who would win every head to head race. Next best is Approval voting, which lets you vote for your favorite, or two you like equally, in addition to the lessor of evils you think you have to vote for, so you don't split votes like the current voting system. The major parties will always have power if voters are afraid to vote for any other than the big lessor of evils.

  5. #5
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    They see me rolling, they hating...

    Re: Dietary soy-phytoestrogens decrease testosterone levels

    I can see myself in a year or two in a big field of Lavender with my head full of hair and a tear dropping of my eye!

  6. #6
    Senior Member Bryan's Avatar
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    Re: Dietary soy-phytoestrogens decrease testosterone levels

    Quote Originally Posted by IBM
    While all phytoestrogens are considered disruptive for male sexual function, some phytoestrogenic herbal extracts, such as damiana, are considered aphrodisiacs for women.

    The following chain of thought has been offered to explain this phenomenon: the phytoestrogens of such herbal extracts occupy estrogen receptor sites of the female body. These receptor sites are thereby closed to the woman's own estrogens. The woman's own estrogens are considered stronger than phytoestrogens. That estrogen receptor sites are occupied by weak phytoestrogens instead of the woman's own stronger estrogens tilts the balance between androgens and estrogens in favor of androgens. As the theory goes, the women will therefore feel more sexual appetite.

    In men, damiana will likely have the opposite effect. Weak phytoestrogens such as damiana do not only bind to estrogen receptor sites but also to testosterone receptor sites, so that in men, they cause overall testosterone levels to decline.
    http://www.cockatoo.com/phytoestrogen/index.htm
    That doesn't explain why testosterone levels would decline.
    1) No, damnit, finasteride for hairloss was NOT an "accidental discovery".
    2) No, you do NOT have to use minoxidil and Retin-A at the same time.
    3) No, washing your skin does NOT make it produce more sebum.

  7. #7
    Senior Member IBM's Avatar
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    Re: Dietary soy-phytoestrogens decrease testosterone levels

    Bryan how can we reduce testosterone in our body?

  8. #8
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    Re: Dietary soy-phytoestrogens decrease testosterone levels

    IBM, if you had high testosterone levels, you'd probably be naturally muscular. Not sure about that though. Well, you'd be as muscular as the average black man.
    Support instant round robbin voting (Condorcet), which elects the candidate who would win every head to head race. Next best is Approval voting, which lets you vote for your favorite, or two you like equally, in addition to the lessor of evils you think you have to vote for, so you don't split votes like the current voting system. The major parties will always have power if voters are afraid to vote for any other than the big lessor of evils.

  9. #9
    Senior Member IBM's Avatar
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    Re: Dietary soy-phytoestrogens decrease testosterone levels

    Quote Originally Posted by collegechemistrystudent
    IBM, if you had high testosterone levels, you'd probably be naturally muscular. Not sure about that though. Well, you'd be as muscular as the average black man.
    I'm the inversion of black men. My muscles are rare and flacid. But that doesnt mean that my testosterone is low or normal.

  10. #10
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    Re: Dietary soy-phytoestrogens decrease testosterone levels

    Trying to fight hair loss by decreasing Testosterone is basically just a more problematic & less effective way of doing what Fin or Dut would do.

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