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Hormonal effect of male consuming soy protein
- Thread starter plornive
- Start date
Plor,
That's a pretty deep question but I will guarantee you something right now, soy protein is not going to increase your testosterone or estrogen levels. A protein is a protein. Soy is a relatively well balanced protein, at that. However, anything in excess can throw off the bodies homeostasis.
Balance is the cardinal rule. Eat your soy products to the extent of your desires. . .and balance them with other protein sources. You're endocrine system is not easily tinkered with until other hormones are introduced beyond what your body naturally produces. And once that happens (with AAS therapy). . .there are some alterations in nutrient needs.
Peace,
Conan; RD, LDN
Former NPC Mr. Utah
That's a pretty deep question but I will guarantee you something right now, soy protein is not going to increase your testosterone or estrogen levels. A protein is a protein. Soy is a relatively well balanced protein, at that. However, anything in excess can throw off the bodies homeostasis.
Balance is the cardinal rule. Eat your soy products to the extent of your desires. . .and balance them with other protein sources. You're endocrine system is not easily tinkered with until other hormones are introduced beyond what your body naturally produces. And once that happens (with AAS therapy). . .there are some alterations in nutrient needs.
Peace,
Conan; RD, LDN
Former NPC Mr. Utah
Raptorex
New member
A more recent study, results suggesting that the hormonal effect is modified by age but the results are counter-intuitive to me (i.e., increased dhea in soy group)...
Nutr Cancer. 2005;51(1):1-6.
Hormonal response to diets high in soy or animal protein without and with isoflavones in moderately hypercholesterolemic subjects.
Goldin BR, Brauner E, Adlercreutz H, Ausman LM, Lichtenstein AH.
Department of Family Medicine and Community Medicine, Tufts University School of Medicine, Boston, MA 02111, USA.
Consumption of soy protein has been associated with altered risk of developing endocrine-regulated cancers. This study was designed to assess the independent effect of soy relative to animal protein and soy-derived isoflavones on circulating estrogen and androgen concentrations in postmenopausal women and older men. Forty-two subjects (> 50 yr) with low-density lipoprotein cholesterol levels of > or = 3.36 mmol/l were fed each of 4 diets in randomized order for 6 wk/phase. All food and drink were provided. Diets contained 25 g soy or common sources of animal protein/4.2 MJ containing trace or 50 mg isoflavones/4.2 MJ. At the end of each diet phase, concentrations of estrone sulfate, estrone, estradiol, testosterone, androstendione, dihydrotestosterone, dehydroepiandrosterone, and dehydroepiandrosterone sulfate were measured. In postmenopausal women, concentrations of estrone were higher and its precursor, dehydroepiandrosterone, lower after consuming the soy compared with animal protein diets (P = 0.0396 and 0.0374, respectively). There was no significant effect of isoflavones on any of the hormones measured. In older men, dehydroepiandrosterone sulfate concentrations were lower after consuming the isoflavone (P = 0.0106) and higher after soy, compared with the animal protein diets (P = 0.0118). These data suggest that relatively large amounts of soy protein or soy-derived isoflavones had modest and limited sex-specific effects on circulating hormone levels.
Nutr Cancer. 2005;51(1):1-6.
Hormonal response to diets high in soy or animal protein without and with isoflavones in moderately hypercholesterolemic subjects.
Goldin BR, Brauner E, Adlercreutz H, Ausman LM, Lichtenstein AH.
Department of Family Medicine and Community Medicine, Tufts University School of Medicine, Boston, MA 02111, USA.
Consumption of soy protein has been associated with altered risk of developing endocrine-regulated cancers. This study was designed to assess the independent effect of soy relative to animal protein and soy-derived isoflavones on circulating estrogen and androgen concentrations in postmenopausal women and older men. Forty-two subjects (> 50 yr) with low-density lipoprotein cholesterol levels of > or = 3.36 mmol/l were fed each of 4 diets in randomized order for 6 wk/phase. All food and drink were provided. Diets contained 25 g soy or common sources of animal protein/4.2 MJ containing trace or 50 mg isoflavones/4.2 MJ. At the end of each diet phase, concentrations of estrone sulfate, estrone, estradiol, testosterone, androstendione, dihydrotestosterone, dehydroepiandrosterone, and dehydroepiandrosterone sulfate were measured. In postmenopausal women, concentrations of estrone were higher and its precursor, dehydroepiandrosterone, lower after consuming the soy compared with animal protein diets (P = 0.0396 and 0.0374, respectively). There was no significant effect of isoflavones on any of the hormones measured. In older men, dehydroepiandrosterone sulfate concentrations were lower after consuming the isoflavone (P = 0.0106) and higher after soy, compared with the animal protein diets (P = 0.0118). These data suggest that relatively large amounts of soy protein or soy-derived isoflavones had modest and limited sex-specific effects on circulating hormone levels.
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