Dietary soy-phytoestrogens decrease testosterone levels

[IBM]

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/entrez?db=pubmed&uid=11524239&cmd=showdetailview&indexed=google

 

[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

 

[squeegee]

going to put soy on my head!

 

[CCS]

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 spironolactone. 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.

 

[squeegee]

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!

 

[Bryan]

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.

 

[IBM]

Bryan how can we reduce testosterone in our body?

 

[CCS]

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.

 

[IBM]

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.

 

[cal]

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

 

[IBM]

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

What about finasteride/dutasteride and decrease T levels?

 

[Jkkezh]

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.

Check you index/ring finger ratio, that gives an indication on testosterone levels. My guess is yours is low if your muscles are 'rare and flacid'

 

[IBM]

On my left hand my index finger is little higher (but almost equal) then my ring finger. On my right the ring finger is little (but almost equal) then my index finger... But i'm going bald.

 

[abcdefg]

testosterone binds just like dht and causes hairloss just not nearly as powerful as dht. propecia and dutasteride increase testosterone and no one can prove that slow gradual hairloss over the years doesnt have anything to do with testosterone levels.
Also you can guess at testosterone levels by how much muscle someone has or there finger ratios or whatever you want. That doesnt mean thats whats causing the hairloss or even that those guesses are right and testosterone fluctuates a lot throughout different activities much blood pressure.