Soy and Phytoestrogens - Its Effects on Males?

J

jwjpilot

New Member
I am wondering what impact soy products would have on a males (or females for that matter) weight training?

I know soy contains phytoestrogens, and I assume estrogen is a enemy of BB because of the estrogen inhibiters/blockers on the market.

So how does soy figure in on weight training? What effects will it have?

This came to mind because Walmart was having a sale on tofu, the extra hard tofu has 50 grams of protein a package and is only a dollar. Pretty darn cheap protein, pop that in the blender with a little cocoa and stevia, delicious!



Thanks

JWJ
 
Dont worry about it

While soy contains phytoestrogens (as many plants do) the effects are tiny and more than likely unmeasureable.

I would be more worried about environemental estrogens than anything from soy.
 
[b said:
Quote[/b] (Aaron_F @ Feb. 03 2004,12:10)]Dont worry about it
While soy contains phytoestrogens (as many plants do) the effects are tiny and more than likely unmeasureable.
I would be more worried about environemental estrogens than anything from soy.
Click to expand...
could you say more about "environmental estrogens"?

thanks
 
Im not an expert on them, but there are chemicals in use in plastics, pesticides, blah blah blah that have far greater estrogenic properties than soy ever will

THere are a few books out there about it tho
 
[b said:
Quote[/b] (Aaron_F @ Feb. 03 2004,12:10)]Dont worry about it
While soy contains phytoestrogens (as many plants do) the effects are tiny and more than likely unmeasureable.
I would be more worried about environemental estrogens than anything from soy.
Click to expand...
Thanks Aaron,

I'm happy to hear that

Here comes a chocolate tofu shake.



JWJ
 
To date there is only one study I know of looking specifically at the effects of phytoestrogens on endocrine function. They used only 40mg as a tablet once per day. It had no effect on endocrine function. However, an earlier study using soy protein (60 grams/day) showed dramatic increases in blood levels of phytoestrogens. That study did not look at endocrine function.

I would think that 20 grams soy protein isolate per day should not pose a problem. Tofu is one of the highest sources of soy phytoestrogen BTW.
 
Here is an interesting study:

Nagata C, Takatsuka N, Shimizu H, Hayashi H, Akamatsu T, Murase K. Effect of soymilk consumption on serum estrogen and androgen concentrations in Japanese men. Cancer Epidemiol Biomarkers Prev. 2001 Mar;10(3):179-84. Erratum in: Cancer Epidemiol Biomarkers Prev 2001 Sep;10(9):1013.
 
[b said:
Quote[/b] (Bryan Haycock @ Feb. 03 2004,7:29)]Tofu is one of the highest sources of soy phytoestrogen BTW.
Click to expand...
Hum...

Not what I wanted to hear, but truth is truth. ;)

Well I never had the shake, so that's good. I think for me personally I'll try to stay away from soy, I have a hard enough time gaining LBM anyway.

Thanks for the comments Bryan
JWJ
 
Here's an older one:

Lu L. J. W., Anderson K. E., Geady J. J., Nagamani M. Effects of one month of soya consumption on circulating steroids in men. Proc. Am. Assoc. Cancer Res., 37: 270 1996.
 
Well, the jury is still out on soy. It does appear to have health "benefits". The effects on endocrine function are thus far inconsistant in human studies. In rats, soy has a significant effect but this may be the result of study design, soy intake levels, rat endocrine physiology, etc.
 
i get a lot of soy protein from the cereal and soy milk i eat for breakfast almost every day. i haven't noticed any difference in anything since i started taking in more soy protein than before. i'm lactose intolerant which is why i switched to soy milk btw.
 
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