Testosterone levels of vegans vs meat eaters

Discussion in 'Men's Health Forum' started by Handle2, May 25, 2013.

  1. #1
    Handle2

    Handle2 Member

    I'm curious to know if men on a vegan or even vegetarian diet would have lower testosterone levels than men who eat meat. Is anyone aware of any studies that have been done on this?
     
  2. #2
    Michael Scally MD

    Michael Scally MD Doctor of Medicine

    Key TJ, Roe L, Thorogood M, Moore JW, Clark GM, Wang DY. testosterone, sex hormone-binding globulin, calculated free testosterone, and oestradiol in male vegans and omnivores. Br J Nutr 1990;64(1):111-9. Cambridge Journals Online - British Journal of Nutrition - Abstract - Testosterone, sex hormone-binding globulin, calculated free testosterone, and oestradiol in male vegans and omnivores

    Total testosterone (T), total oestradiol (E2) and sex hormone-binding globulin (SHBG) concentrations were measured in plasma samples from fifty-one male vegans and fifty-seven omnivores of similar age. Free T concentration was estimated by calculation. In comparison with the omnivores, the vegans had 7% higher total T (P = 0.250), 23% higher SHBG (P = 0.001), 3% lower free T (P = 0.580), and 11% higher E2 (P = 0.194). In a subset of eighteen vegans and twenty-two omnivores for whom 4 d diet records were available, there were statistically significant correlations between T and polyunsaturated fatty acids (r 0.37), SHBG and fat (r 0.43 for total fat, 0.46 for saturated fatty acids and 0.33 for polyunsaturated fatty acids), and SHBG and alcohol (r-0.39). It is concluded that a vegan diet causes a substantial increase in SHBG but has little effect on total or free T or on E2.


    Allen NE, Appleby PN, Davey GK, Key TJ. Hormones and diet: low insulin-like growth factor-I but normal bioavailable androgens in vegan men. Br J Cancer 2000;83(1):95-7. British Journal of Cancer - Hormones and diet: low insulin-like growth factor-I but normal bioavailable androgens in vegan men

    Mean serum insulin-like growth factor-I was 9% lower in 233 vegan men than in 226 meat-eaters and 237 vegetarians (P = 0.002). Vegans had higher testosterone levels than vegetarians and meat-eaters, but this was offset by higher sex hormone binding globulin, and there were no differences between diet groups in free testosterone, androstanediol glucuronide or luteinizing hormone.
     
  3. #3
    Handle2

    Handle2 Member

    Thanks. Do you have any idea why a vegan diet would increase SHBG and E2?
     
  4. #4
    foreveryoung

    foreveryoung Well-Known Member

    it said nothing of the sort about e2
     
  5. #5
    Millard Baker

    Millard Baker Member

    The first study reported higher E2 for vegans but it wasn't statistically significant.
     
  6. #6
    foreveryoung

    foreveryoung Well-Known Member

    ok, I missed that, but I guess the fact that it wasn't significant is what we should emphasize

    probably the fact that free T was raised would account for an equal raise in e2 one would think
     
  7. #7
    hardasnails1973

    hardasnails1973 Active Member

    inflammation from all the grains and other inflammatory foods you have in your food selections. I do not recommend vegan diets, 30-40 years ago be different stories. SHBG increases with lower protein, fats, and higher fiber intake. There are medical studies to support this.
     
  8. #8
    hardasnails1973

    hardasnails1973 Active Member

    inflammation from all the grains and other inflammatory foods you have in your food selections can cause a lot of issues. I do not recommend vegan diets, 30-40 years ago be different stories. SHBG increases with lower protein, fats, and higher fiber intake. There are medical studies to support this.
     

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