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Cancer Epidemiology, Biomarkers & Prevention
Cancer Epidemiology, Biomarkers & Prevention
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Research Articles

Effect of Soymilk Consumption on Serum Estrogen and Androgen Concentrations in Japanese Men

Chisato Nagata, Naoyoshi Takatsuka, Hiroyuki Shimizu, Haruo Hayashi, Tomomitsu Akamatsu and Kyouichi Murase
Chisato Nagata
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Naoyoshi Takatsuka
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Hiroyuki Shimizu
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Haruo Hayashi
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Tomomitsu Akamatsu
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Kyouichi Murase
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DOI:  Published March 2001
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    Fig. 1.

    The means of log-transformed concentrations of total testosterone, free-testosterone, estrone, estradiol, and SHBG over time for each of the dietary groups. Points, mean; bars, SE.

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  • Table 1

    Demographic characteristics before the dietary study period

    Soymilk-supplemented (n = 17)Control (n = 17)
    Age (yr)32.0 (8.4)a32.8 (8.3)a
    Height (cm)169.6 (5.9)a169.1 (4.7)a
    Weight (kg)67.1 (9.9)a68.9 (9.6)a
    Body mass index (kg/m2)23.3 (3.2)a23.8 (2.9)a
    Married9 (52.9)b13 (76.5)b
    Parous9 (52.9)b10 (58.8)b
    Current smoker11 (64.7)b11 (64.7)b
    Past smoker1 (5.9)b2 (11.8)b
    • a Mean (SD).

    • b No. (%).

  • Table 2

    Food and nutrient consumptiona before and following the dietary study period

    Soymilk supplemented (n = 17)Control (n = 17)
    InitialFinalInitialFinal
    Soymilk
     Total amount (ml)0.0 (0.0)342.9 (74.2)b0.0 (0.0)0.0 (0.0)
     Isoflavones (mg)0.0 (0.0)76.8 (16.6)b0.0 (0.0)0.0 (0.0)
    Other soy products
     Total amount (g)30.1 (18.0)31.0 (17.5)38.6 (26.0)39.3 (30.5)
     Isoflavones (mg)16.1 (10.4)16.0 (8.2)18.2 (13.3)17.8 (11.4)
    Nutrient
     Energy (kcal)2,244 (613)2,214 (261)2,030 (597)2,046 (481)
     Protein (g)73.6 (18.9)86.7 (15.3)72.7 (24.6)71.5 (17.6)
     Fat (g)77.3 (29.6)76.0 (16.9)63.5 (24.8)62.2 (16.3)
     Cholesterol (mg)279 (74)326 (96)290 (106)312 (105)
     Carbohydrate (g)287 (75)272 (52)262 (81)262 (61)
     Crude fiber (g)3.4 (1.3)3.5 (0.7)3.0 (1.5)3.2 (1.8)
     Retinol (μg)265 (162)150 (59)c412 (597)156 (73)
     Carotene (μg)1,687 (789)1,380 (532)1,556 (696)1,781 (2,131)
     Vitamin A (IU)1,491 (694)1,029 (316)c1,830 (1,700)1,230 (1,107)
     Vitamin B1 (mg)0.71 (0.22)2.56 (0.57)b0.68 (0.25)0.64 (0.23)
     Vitamin B2 (mg)0.95 (0.37)0.97 (0.27)0.97 (0.40)0.89 (0.30)
     Vitamin C (mg)81.5 (109)66.8 (66.5)33.7 (31.5)30.1 (21.3)
     Vitamin D (mg)182 (100)127 (69)191 (131)198 (132)
     Vitamin E (mg)8.1 (2.6)7.5 (2.2)7.1 (2.8)6.8 (1.9)
     Phosphate (mg)1,051 (267)1,230 (213)b1,039 (370)1,011 (260)
     Calcium (mg)406 (167)401 (148)393 (197)372 (146)
     Iron (mg)9.5 (2.8)11.1 (2.0)b9.5 (3.7)9.7 (5.6)
     Salt (g)12.0 (3.5)10.6 (2.6)c10.6 (4.2)10.5 (3.0)
     Alcohol (g)12.6 (19.4)11.1 (15.1)18.3 (19.8)24.2 (33.5)
    • a Mean (SD).

    • b P < 0.01 for the difference between initial and final.

    • c P < 0.01 for the difference between initial and final.

  • Table 3

    Serum concentrations of sex hormones and SHBG before the dietary study perioda

    Soymilk-supplemented (n = 17)Control (n = 17)
    Total testosterone (ng/dl)470.9 (145.4)449.5 (134.0)
    [188.0–741.0][234.0–714.0]
    Free testosterone (pg/ml)16.2 (6.2)14.9 (4.5)
    [7.8–27.3][8.9–23.1]
    Estrone (pg/ml)29.5 (11.4)27.8 (9.7)
    [11.7–51.3][14.1–50.6]
    Estradiol (pg/ml)33.6 (15.2)29.6 (5.3)
    [16.6–82.4][18.8–36.1]
    SHBG (nmol/liter)33.5 (14.0)34.8 (14.0)
    [12.0–61.0][12.0–60.0]
    • a Mean (SD). Ranges are given in brackets.

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March 2001
Volume 10, Issue 3
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Effect of Soymilk Consumption on Serum Estrogen and Androgen Concentrations in Japanese Men
Chisato Nagata, Naoyoshi Takatsuka, Hiroyuki Shimizu, Haruo Hayashi, Tomomitsu Akamatsu and Kyouichi Murase
Cancer Epidemiol Biomarkers Prev March 1 2001 (10) (3) 179-184;

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Effect of Soymilk Consumption on Serum Estrogen and Androgen Concentrations in Japanese Men
Chisato Nagata, Naoyoshi Takatsuka, Hiroyuki Shimizu, Haruo Hayashi, Tomomitsu Akamatsu and Kyouichi Murase
Cancer Epidemiol Biomarkers Prev March 1 2001 (10) (3) 179-184;
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