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Babyfaced Assassin
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Yay or Nay?
Reasons?
Reasons?
Soy Milk - Yay or Nay
- Thread starter Babyfaced Assassin
- Start date
FatRat
New member
Personally I stay away from Soy products because of the links to estrogen production. The Soybean contains chemical structures similar to the estrogens produced in the body and it is believed that eating foods rich in these can raise estrogen levels. For this reason Soy is recommended by some to be a natural way to treat women for the symptoms of menopause. That said, the effects would probably be minimal, but its your call… 
Babyfaced Assassin
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i'm not seeing it from the protein point of view but as a milk replacement in for example oatmeal etc
bigmantitties
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I ate mostly soy protein for 10 years... draw your own conclusions
D
Deleted member 33117
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I've already covered this one. Lets forget about the photo-estragens. Soy products have been proven to lower testosterone production. This has been tested in young men, with fairly consistant results, and those resultings being: eating a large serving of soy causes a very measurable drop in total serum testosterone within hours of consumption. I say nay.
D
Deleted member 33117
Guest
bigmantitties said:I ate mostly soy protein for 10 years... draw your own conclusions
Ok, that's hillarious... but he is right. Excessive soy consumption will elevate estragen levels in men, reduce testosterone and increase shbg levels. Hardely the ideal hormonal environment for a male bodybuilder.
Stryc-9
New member
Soy milk intake in relation to serum sex hormone levels in British men.
Allen NE, Appleby PN, Davey GK, Key TJ.
Cancer Research UK Epidemiology Unit, University of Oxford, Oxford OX2 6HE, UK. [email protected]
Soy beans contain high levels of the isoflavones genistein and daidzein and their glycosides and have been implicated in the prevention of prostate cancer, possibly via their effects on sex hormone metabolism. The aim of this study was to assess the relation between dietary soy intake and sex hormone levels in a cross-sectional analysis of 696 men with a wide range of soy intakes. Soy milk intake was measured using a validated semiquantitative food frequency questionnaire, and serum hormone concentrations were measured by immunoassay. Multiple regression was used to investigate the association between soy milk intake, an index of isoflavone intake, and hormone levels after adjustment for pertinent confounders. Soy milk intake was not associated with serum concentrations of testosterone, free testosterone, androstanediol glucuronide, sex hormone-binding globulin, or luteinizing hormone. These results suggest that soy milk intake, as a marker of isoflavone intake, is not associated with serum sex hormone concentrations among free-living Western men.
------------------------------------
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.
Soy consumption has been associated with a reduced risk of prostate cancer. The mechanism for this association may involve the effect of soy on the endocrine system. 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. None of the 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.
------------------------------------
J Nutr Sci Vitaminol (Tokyo). 2001 Aug;47(4):283-8. Related Articles, Links
Effects of soy protein on levels of remnant-like particles cholesterol and vitamin E in healthy men.
Higashi K, Abata S, Iwamoto N, Ogura M, Yamashita T, Ishikawa O, Ohslzu F, Nakamura H.
First Department of Internal Medicine, National Defense Medical College, Tokorozawa, Saitama, Japan.
We determined the effects of soy protein isolate (SPI) intake on remnant-like particles (RLP), lipolytic enzymes, lipid transfer protein, transaminases, sex hormones, iron, calcium, and vitamin E in healthy men. In the first randomized, crossover experiment, 14 men were given either 20 g per day of SPI or nothing (control) for each 4-week segment. After 3 weeks of SPI intake, TG and RLP cholesterol levels were significantly lower than the baseline by 13.4% (p<0.05) and 9.8% (p<0.05), respectively. However, no significant change was found in total and low-density lipoprotein (LDL) cholesterol levels or the activities of lipoprotein lipase, hepatic lipase, cholesteryl ester transfer protein, and lecithin cholesterol acyltransferase. Although the levels of transaminases, testosterone, iron, and calcium did not change, the vitamin E level was reduced from the baseline by 9.7%, a significant decrease (p<0.01). In the second study, we attempted to determine the effect of vitamin E supplement taken with SPI. For each 3-week segment, 12 men were given 20 g per day of SPI, either with or without 200 mg per day of vitamin E, in a randomized crossover design. The vitamin E level was reduced by 9.2%, a significant decrease (p<0.05), after SPI intake for 3 weeks, and vitamin E supplement increased vitamin E level significantly (p<0.05). These results demonstrate that SPI intake reduces remnant lipoproteins, TG, and the plasma level of vitamin E, although vitamin E supplementation compensates for the reduction of vitamin E. Therefore the supplementation of vitamin E may be required in subjects with long-term and abundant intake of soy protein.
----------------------------------
Hormonal effects of soy in women and men.
Kurzer MS.
Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA. [email protected]
Over the past few years, there has been increasing interest in the possible hormonal effects of soy and soy isoflavone consumption in both women and men. Soy consumption has been suggested to exert potentially cancer-preventive effects in premenopausal women, such as increased menstrual cycle length and sex hormone-binding globulin levels and decreased estrogen levels. There has been some concern that consumption of phytoestrogens might exert adverse effects on men's fertility, such as lowered testosterone levels and semen quality. The studies in women have provided modest support for beneficial effects. One cross-sectional study showed serum estrogens to be inversely associated with soy intake. Seven soy intervention studies controlled for phase of menstrual cycle. These studies provided 32-200 mg/d of isoflavones and generally showed decreased midcycle plasma gonadotropins and trends toward increased menstrual cycle length and decreased blood concentrations of estradiol, progesterone and sex hormone-binding globulin. A few studies also showed decreased urinary estrogens and increased ratios of urinary 2-(OH) to 16alpha-(OH) and 2-(OH) to 4-(OH) estrogens. Soy and isoflavone consumption does not seem to affect the endometrium in premenopausal women, although there have been weak estrogenic effects reported in the breast. Thus, studies in women have mostly been consistent with beneficial effects, although the magnitude of the effects is quite small and of uncertain significance. Only three intervention studies reported hormonal effects of soy isoflavones in men. These recent studies in men consuming soyfoods or supplements containing 40--70 mg/d of soy isoflavones showed few effects on plasma hormones or semen quality.
-------------------------------------------
Allen NE, Appleby PN, Davey GK, Key TJ.
Cancer Research UK Epidemiology Unit, University of Oxford, Oxford OX2 6HE, UK. [email protected]
Soy beans contain high levels of the isoflavones genistein and daidzein and their glycosides and have been implicated in the prevention of prostate cancer, possibly via their effects on sex hormone metabolism. The aim of this study was to assess the relation between dietary soy intake and sex hormone levels in a cross-sectional analysis of 696 men with a wide range of soy intakes. Soy milk intake was measured using a validated semiquantitative food frequency questionnaire, and serum hormone concentrations were measured by immunoassay. Multiple regression was used to investigate the association between soy milk intake, an index of isoflavone intake, and hormone levels after adjustment for pertinent confounders. Soy milk intake was not associated with serum concentrations of testosterone, free testosterone, androstanediol glucuronide, sex hormone-binding globulin, or luteinizing hormone. These results suggest that soy milk intake, as a marker of isoflavone intake, is not associated with serum sex hormone concentrations among free-living Western men.
------------------------------------
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.
Soy consumption has been associated with a reduced risk of prostate cancer. The mechanism for this association may involve the effect of soy on the endocrine system. 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. None of the 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.
------------------------------------
J Nutr Sci Vitaminol (Tokyo). 2001 Aug;47(4):283-8. Related Articles, Links
Effects of soy protein on levels of remnant-like particles cholesterol and vitamin E in healthy men.
Higashi K, Abata S, Iwamoto N, Ogura M, Yamashita T, Ishikawa O, Ohslzu F, Nakamura H.
First Department of Internal Medicine, National Defense Medical College, Tokorozawa, Saitama, Japan.
We determined the effects of soy protein isolate (SPI) intake on remnant-like particles (RLP), lipolytic enzymes, lipid transfer protein, transaminases, sex hormones, iron, calcium, and vitamin E in healthy men. In the first randomized, crossover experiment, 14 men were given either 20 g per day of SPI or nothing (control) for each 4-week segment. After 3 weeks of SPI intake, TG and RLP cholesterol levels were significantly lower than the baseline by 13.4% (p<0.05) and 9.8% (p<0.05), respectively. However, no significant change was found in total and low-density lipoprotein (LDL) cholesterol levels or the activities of lipoprotein lipase, hepatic lipase, cholesteryl ester transfer protein, and lecithin cholesterol acyltransferase. Although the levels of transaminases, testosterone, iron, and calcium did not change, the vitamin E level was reduced from the baseline by 9.7%, a significant decrease (p<0.01). In the second study, we attempted to determine the effect of vitamin E supplement taken with SPI. For each 3-week segment, 12 men were given 20 g per day of SPI, either with or without 200 mg per day of vitamin E, in a randomized crossover design. The vitamin E level was reduced by 9.2%, a significant decrease (p<0.05), after SPI intake for 3 weeks, and vitamin E supplement increased vitamin E level significantly (p<0.05). These results demonstrate that SPI intake reduces remnant lipoproteins, TG, and the plasma level of vitamin E, although vitamin E supplementation compensates for the reduction of vitamin E. Therefore the supplementation of vitamin E may be required in subjects with long-term and abundant intake of soy protein.
----------------------------------
Hormonal effects of soy in women and men.
Kurzer MS.
Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA. [email protected]
Over the past few years, there has been increasing interest in the possible hormonal effects of soy and soy isoflavone consumption in both women and men. Soy consumption has been suggested to exert potentially cancer-preventive effects in premenopausal women, such as increased menstrual cycle length and sex hormone-binding globulin levels and decreased estrogen levels. There has been some concern that consumption of phytoestrogens might exert adverse effects on men's fertility, such as lowered testosterone levels and semen quality. The studies in women have provided modest support for beneficial effects. One cross-sectional study showed serum estrogens to be inversely associated with soy intake. Seven soy intervention studies controlled for phase of menstrual cycle. These studies provided 32-200 mg/d of isoflavones and generally showed decreased midcycle plasma gonadotropins and trends toward increased menstrual cycle length and decreased blood concentrations of estradiol, progesterone and sex hormone-binding globulin. A few studies also showed decreased urinary estrogens and increased ratios of urinary 2-(OH) to 16alpha-(OH) and 2-(OH) to 4-(OH) estrogens. Soy and isoflavone consumption does not seem to affect the endometrium in premenopausal women, although there have been weak estrogenic effects reported in the breast. Thus, studies in women have mostly been consistent with beneficial effects, although the magnitude of the effects is quite small and of uncertain significance. Only three intervention studies reported hormonal effects of soy isoflavones in men. These recent studies in men consuming soyfoods or supplements containing 40--70 mg/d of soy isoflavones showed few effects on plasma hormones or semen quality.
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