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Soy affecting testesorone is a myth (sauce inside)
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08-01-2021, 06:41 AM
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#1
- ImUTI
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- ImUTI
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Soy affecting testesorone is a myth (sauce inside)
Lots of ppl on misc think soy = bad for testosterone. According to this blog post, thats a myth. any rebuttals?
The truth is that none of these claims are born out in the research. The small studies that seemed to show that sperm count was reduced in men consuming soy were subsequently debunked by a number of follow-up studies done on a larger scale. The handful of studies showing any sort of negative effects of consuming soy have all been done using extremely high amounts of soy (over four servings daily), beyond what most people would likely consume.
In fact, a recently published analysis looking at 41 clinical trials and testing almost 2,000 men debunked the soy estrogen myth once and for all. This study found that, across all trials analyzed, soy protein had zero impact on testosterone or estrogen levels in men. Jim White, RDN, American College of Sports Medicine Exercise Physiologist, and owner of Jim White Fitness & Nutrition Studios commented on this study, “Time and time again, research has shown that soy protein is a great choice for your health and won’t negatively impact your hormone levels. With so much misinformation circulating, it is imperative that we look to credible sources such as these studies.”
https://soylent.com/blogs/news/is-so...mmon-soy-mythsIn fact, a recently published analysis looking at 41 clinical trials and testing almost 2,000 men debunked the soy estrogen myth once and for all. This study found that, across all trials analyzed, soy protein had zero impact on testosterone or estrogen levels in men. Jim White, RDN, American College of Sports Medicine Exercise Physiologist, and owner of Jim White Fitness & Nutrition Studios commented on this study, “Time and time again, research has shown that soy protein is a great choice for your health and won’t negatively impact your hormone levels. With so much misinformation circulating, it is imperative that we look to credible sources such as these studies.”
08-01-2021, 06:42 AM
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#2
- SettingOff
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- SettingOff
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i counter the soy by smoking cigs
08-01-2021, 06:47 AM
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#3
08-01-2021, 06:50 AM
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#4
- snowergrower
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- snowergrower
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What about placebo test drop from soy then?
08-01-2021, 06:52 AM
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#5
- jtaylor2010
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A blog from soylent.com
Well I guess that settles it.
Edit to add- it is basically saying that soy protein is so processed that a lot of the estrogenic effects are minimized or non-existent, but that doesn’t apply to all forms of soy.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5188409/
Isoflavones have a chemical structure similar to the hormone estrogen which allows them to bind to both estrogen receptors (ER)—ERα and ERβ [92,93]. For this reason they are able to exert estrogen-like effects under certain experimental conditions and so are referred to as phytoestrogens. Note that although research shows isoflavones bind to ERs much more weakly than estrogen, circulating levels of isoflavones in response to the ingestion of approximately two servings of soyfoods are three orders of magnitude higher than estrogen [94]. More importantly, whereas estrogen binds to and transactivates ERα and ERβ equally, isoflavones preferentially bind to and transactivate ERβ [95,96,97,98]. This difference in binding and transactivation between isoflavones and estrogen is significant because the two ERs have different tissue distributions and, when activated, can have different and sometimes even opposite physiological effects [99,100].
The preference of isoflavones for ERβ is the primary reason that isoflavones are seen as capable of having tissue-selective effects and the reason they are classified as selective estrogen receptor modulators (SERMs) [101,102,103]. In tissues that possess estrogen receptors, SERMs exert estrogen-like effects in some cases but no effects or antiestrogenic effects in others. The pharmaceutical industry has for many years been actively developing SERMs [104]. Widely used SERMs include tamoxifen and raloxifene, both of which are used to treat breast cancer, the latter of which is also used for the treatment of osteoporosis [105]. There is limited clinical evidence to suggest that dietary levels of isoflavones affect immune function although there is interesting in vitro and animal work on this topic [106]. It is notable in this regard that Ryan-Borchers et al. (2006) found an isoflavone intervention (~70 mg/day) in postmenopausal women resulted in higher B cell populations which they interpreted as a heightened humoral response [107].
Well I guess that settles it.
Edit to add- it is basically saying that soy protein is so processed that a lot of the estrogenic effects are minimized or non-existent, but that doesn’t apply to all forms of soy.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5188409/
Isoflavones have a chemical structure similar to the hormone estrogen which allows them to bind to both estrogen receptors (ER)—ERα and ERβ [92,93]. For this reason they are able to exert estrogen-like effects under certain experimental conditions and so are referred to as phytoestrogens. Note that although research shows isoflavones bind to ERs much more weakly than estrogen, circulating levels of isoflavones in response to the ingestion of approximately two servings of soyfoods are three orders of magnitude higher than estrogen [94]. More importantly, whereas estrogen binds to and transactivates ERα and ERβ equally, isoflavones preferentially bind to and transactivate ERβ [95,96,97,98]. This difference in binding and transactivation between isoflavones and estrogen is significant because the two ERs have different tissue distributions and, when activated, can have different and sometimes even opposite physiological effects [99,100].
The preference of isoflavones for ERβ is the primary reason that isoflavones are seen as capable of having tissue-selective effects and the reason they are classified as selective estrogen receptor modulators (SERMs) [101,102,103]. In tissues that possess estrogen receptors, SERMs exert estrogen-like effects in some cases but no effects or antiestrogenic effects in others. The pharmaceutical industry has for many years been actively developing SERMs [104]. Widely used SERMs include tamoxifen and raloxifene, both of which are used to treat breast cancer, the latter of which is also used for the treatment of osteoporosis [105]. There is limited clinical evidence to suggest that dietary levels of isoflavones affect immune function although there is interesting in vitro and animal work on this topic [106]. It is notable in this regard that Ryan-Borchers et al. (2006) found an isoflavone intervention (~70 mg/day) in postmenopausal women resulted in higher B cell populations which they interpreted as a heightened humoral response [107].
08-01-2021, 06:52 AM
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#6
08-01-2021, 07:03 AM
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#7
- DivineMasculine
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- DivineMasculine
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08-01-2021, 07:45 AM
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#8
08-01-2021, 07:49 AM
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#9
08-01-2021, 07:49 AM
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#10
- r32gojirra
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- r32gojirra
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Nice try kikkoman
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