Tryptophan administration lowers T levels

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    Tryptophan administration lowers T levels


    Brain 5-hydroxytryptamine and plasma testosterone... [Endocr Res. 1985] - PubMed - NCBI

    I have a few questions as the study is a bit over my head:

    1. Is it reasonable to assume that the same effects could be observed in humans?
    2. Any way to counteract the T lowering effects described in the study?
    3. Is a low dose of melatonin (1mg) going to have similar effects?

    I do like my tryptophan but I don't want sth to decreasing my T levels as I am already borderline low now. I wonder if tryptophan is to blame..

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    "Human chorionic gonadotropin (HCG) administration in L-tryptophan treated rats for 21 days increased the plasma testosterone level in spite of increased brain 5-HT level."

    Just grab you some hcg

    Judging solely from the abstract, it appears to be saying that higher levels of 5-HT in the brain correlates with lower testosterone levels. But is it only when those levels are elevated due to trytophan dosing? Or are high 5-HT levels always indicative of lower T? Probably not that cut and dried. Reminds me of the vitamin D study where subjects with higher D levels had higher T.
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    ssri's increase synaptic levels of serotonin and have also been associated with lower testosterone levels

    how much tryptophan were they giving these animals?
    Anabolicminds.com Featured Author
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    Quote Originally Posted by Patrick Arnold
    ssri's increase synaptic levels of serotonin and have also been associated with lower testosterone levels

    how much tryptophan were they giving these animals?
    I wonder the same thing.
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    I will check and see if l can get a full text.
  

  
 

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