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Wednesday, August 31, 2011

Soy and Sex Hormones in healthy adult male

Posted by Chantel M. Contributed by US National Library of Medicine National Institutes of Health

In a study of "Effects of replacing meat with soyabean in the diet on sex hormone concentrations in healthy adult males." by Habito RC, Montalto J, Leslie E, Ball MJ. (School of Biological and Chemical Sciences, Deakin University, Melbourne, Australia.). A randomised crossover dietary intervention study was performed to evaluate the effects of replacing meat protein in the diet with a soyabean product, tofu, on blood concentrations of testosterone, dihydrotestosterone, androstanediol glucuronide, oestradiol, sex hormone-binding globulin (SHBG), and the free androgen index (total testosterone concentration/SHBG concentration x 100; FAI). Forty-two healthy adult males aged 35-62 years were studied, researchers found that Adjusting for weight change revealed SHBG to be 8.8% higher on the tofu diet (mean difference 3 (95% CI 0.7, 5.2) nmol/l; P = 0.01) and testosterone:oestradiol to be significantly lower, P = 0.049). Thus, replacement of meat protein with soyabean protein, as tofu, may have a minor effect on biologically-active sex hormones, which could influence prostate cancer risk. However, other factors or mechanisms may also be responsible for the different incidence rates in men on different diets.

1 comment:

  1. What does this researcher feel is the BEST method of reducing prostate cancer risk?

    ReplyDelete