soy protein

[jazer80]

is it true soy isn't good for guys to take? i ask because my gf has a jar and i was gonna add scoops at nighttime to my shake (along w/ whey, milk, and liquid egg)

[_-_v_-_]

Nothing wrong with soy.

[v8firebird]

It works well but promotes a healthy estrogen level. This isn't good if you have naturally high levels to begin with or are prone to gyno.

[jazer80]

well i've never noticed any type of gyno, so you guys would recommend it? i mean i thought it would just add more diversity to my shake but if it's gonna cause problems it's not worth it. what does having a healthy estrogen level entail (besides gyno)?

[jazer80]

like if i want to be on the safe side (since i've never had symptoms but don't want to either) how many grams shoudl i take daily?

[geoffgarcia]

I take about 10

[jazer80]

just to update i've been taking about 60 grams daily of supro soy protein (the type of soy in most quality powders) for a good while and haven't grown any titties yet. also found out that it has really good antioxidants and other beneficial things, and a really good amino acid profile, and is very slow digesting, so my nighttime shake is always 25 grams soy in a large glass of milk

[TheGimp]

Yup soy is good. The key as with most things is variety; sounds like you're still getting plenty of protein from other sources.

As far as estrogen, here's a couple of studies I keep throwing around :)

They suggest that soy intake could decrease estrogen levels in men.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=11303585

Effect of soymilk consumption on serum estrogen and androgen concentrations in Japanese men.

Nagata C, Takatsuka N, Shimizu H, Hayashi H, Akamatsu T, Murase K.

Department of Public Health, Gifu University School of Medicine, Japan.

... We conducted a randomized dietary intervention study to determine the effects of soy consumption on serum levels of steroid hormones in men. Thirty-five men were randomly assigned to either a soymilk-supplemented group or a control group. The men in the soy-supplemented group were asked to consume 400 ml of soymilk daily for 8 weeks. The men in the control group maintained their usual diet. Blood samples were obtained just before the initiation of the dietary period and thereafter every two weeks for 12 weeks. Changes in hormone concentrations were analyzed and compared between the two groups using the mixed linear regression model against weeks from the start of the dietary period. The mean (SD) soymilk intake estimated from dietary records during the dietary study period was 342.9 (SD, 74.2) ml in the soymilk-supplemented group. There was a significant difference between the two groups in terms of changes in serum estrone concentrations, which tended to decrease in the soy-supplemented group and increase in the control group over time. None of the other hormones measured (estradiol, total and free-testosterone, or sex hormone-binding globulin) showed any statistical difference between the two groups in terms of patterns of change. The results of the study indicate that soymilk consumption may modify circulating estrone concentrations in men.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=10798211

Inverse association of soy product intake with serum androgen and estrogen concentrations in Japanese men.

Nagata C, Inaba S, Kawakami N, Kakizoe T, Shimizu H.

Department of Public Health, Gifu University School of Medicine, Japan.

The cross-sectional relationships of soy product intake and serum testosterone, estrone, estradiol, sex hormone-binding globulin, and dihydrotestosterone were examined in 69 Japanese men. Soy product intake was estimated from a semiquantitative food frequency questionnaire. Serum estradiol concentration was significantly inversely correlated with soy product intake (r = -0.32, p = 0.009), and serum estrone concentration was nonsignificantly inversely correlated with soy product intake (r = -0.24, p = 0.05) after controlling for age, body mass index, smoking status, and ethanol intake. Total and free testosterone concentrations were inversely correlated with soy product intake after controlling for the covariates, but these correlations were of border line significance (r = -0.25, p = 0.05 and r = -0.25, p = 0.06, respectively). Similar correlations were observed for these hormones with isoflavone intake from soy products. The data suggest that soy product intake may be associated with the endogenous hormone levels in Japanese men.

[Optimum08]

Thanks Gimp...all anyone hears is how soy promotes estrogen levels but those studies provide the other side...im all for soy as long as u get a nice combination with other proteins...