5

I have found several articles, claiming that soy beans and corn flakes have the effect of decreasing libido.

  • M Lai's HowTo-Howto Blog

    Soy is very good for your health. However, if consumed too much the same effect as licorice, namely reducing the levels of testosterone. [...] Kellogg created cornflakes to reduce sexual desires of the patient.

  • 11 Points makes similar claims.

These are not high-quality sources. Are they right?

6

I did a broad research on google scholar. Here what I found:

2007 - http://ukpmc.ac.uk/abstract/MED/17710586/reload=0;jsessionid=s7Pe14OVZjNyJ6YYgcN5.0

Short-term increased soybean intake does not affect sex hormone status, but improves spatial cognitive performance in young healthy men.

2011 - http://www.neptjournal.com/NEPT10(3)Full%20Issue.pdf#page=18

[...] soy diet had negative effect on male reproductive system in mice

From what I read, it is not clearly demonstrated that soybean lower testosterone, but I would still be careful about how much I eat.

  • 6
    So the answer, it seems, depends on whether you are a man or a mouse ;-) – Kramii Reinstate Monica Jun 18 '12 at 12:05

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