Causes of Andropause
In this link we're going to look at what causes the gradual loss in testosterone,
andropause, that occurs as a man ages. Although the current scientific
understanding in this area definitely has many holes in it, several important
interesting insights have emerged as well. And it is my hope that some of the
younger guys will read this material, put it to use and possibly slow down their
slide toward hypoganadism.
NOTE: For those of you who have forgotten your high school biology,
testosterone is produced in the Leydig cells of the testes. On this page
we are talking about factors that can slowly squeeze the output from these
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Before I go on, though, let me point out that I'm not talking about a rather
sudden, "catastrophic" loss in testosterone that occurs in some males. For
example, I get several emails per day and most of them are from guys with low
testosterone. A surprising number of these men are in their 20's and 30's
and have likely lost their testosterone in just a few months or years.
There can be many reasons for this kind of a sudden loss, including tumors and varicoceles.
See my link on Rapid Testosterone Decreasers for
other more "exotic" causes as well.
So what causes the steady, gradual loss of testosterone that almost all of us
males experience to one degree or another? (I say "almost all of us",
because there are men - or should I say 'lucky bastards'? - in their 70's with
testosterone of 700 ng/dl.) You are immediately going to recognize the
culprits as they can be blamed for a host of other issues besides just
1. Inflammation. Inflammation is arguably our greatest enemy
as males: it sabotages erections, heart health and our brains. It
also puts you at risk for autoimmune disorders, diabetes and cancer. Nice,
eh? Well, it's probably no surprise then that it also is likely a root
cause the loss of testosterone in middle-aged and senior men as well. IL-6 seems
to be the primary culprit.  However, elevated C-Reactive protein has
been implicated as well.  Several studies have also found that fertility and
sperm production are related to inflammation. 
Read my links on How to Lower
Inflammation and Juice and Inflammation
for more information.
2. Mitochondrial Damage. There is a a whole field called The
Mitochondrial Theory of Aging and for good reason: it seems to be a root
cause for much of our decline over the decades. Your testosterone is no
exception: researcher have found that mitochondrial damage in the Leydig
cells corresponds to a loss in testosterone.  The bottom line is that
mitochondrial health is likely critical to decelerating andropause. This
translates to a diet high in certain antioxidants, avoiding fructose and perhaps
taking certain supplements (CoQ10, ALA) as well.
NOTE: An interesting side note is
that there is good evidence that some of the antioxidants, which again would guard and
protect your mitochondria from damage, can powerfully boost testosterone.
For more details, see my link on Antioxidants and Testosterone
for more information.
3. Estrogen. Our old enemy estrogen, specifically E2 or estradiol, is at it
again, this time correlating strongly with inflammation levels. Many men as they
age and gain weight find their estrogen levels rising dramatically and this
study shows they may be putting themselves at additional risk for inflammation
as shown by elevated C-Reactive protein levels.  See my link on How to Lower
Estrogen for additional information.
CAUTION: Some hypogonadal males have low enough testosterone to where they
actually become deficient in estrogen and experience osteoporosis. See my book
Low Testosterone by the Numbers for actual testosterone levels.
Again, I hope that any younger guys will read this and avoid the modern plague of
declining testosterone levels and andropause. I have another link on How
to Avoid Andropause that discusses the Okinawan's success in this area.
Clin Endocrinol (Oxf), 2007 Mar, 66(3):394-8, "Association of endogenous sex
hormone with C-reactive protein levels in middle-aged and elderly men"
2) Diabetes Care July 2005 vol. 28 no. 7 1636-1642, "Relationship Between
Testosterone Levels, Insulin Sensitivity, and Mitochondrial Function in Men"
3) Exp Gerontol, 2001 Aug, 36(8):1361-73, "Age-related increase in mitochondrial
superoxide generation in the testosterone-producing cells of Brown Norway rat
testes: relationship to reduced steroidogenic function?"
4) J Endocrinol Invest, 2005, 28(11 Suppl Proceedings):116-9, "The relationship
between testosterone and molecular markers of inflammation in older men"
5) European Cytokine Network, Jun 2005, 16(2), "Testicular interleukin-6 response
to systemic inflammation"