Testosterone and Mercury
Methyl mercury, a byproduct of the industrial age, has permeated our
environment. The planet is covered in coal-based power plants and these
spew mercury into the atmosphere, which then settles over the entire planet.
Every mountain, valley, ocean and stream becomes polluted leading to a
contaminated food supply for us.
Methylmercury accumulates in the testosterone-producing Leydig cells of the
testes , the brain and pituitary. Several studies have shown workers
occupationally exposed to mercury have lower testosterone levels. 
Keep in mind that it doesn't take much to lower testosterone. Mercury is
both toxic and powerful. Denise Zuniga, the actress who accidently mercury
poisoned herself from eating too many cans of tuna per day, only had tissue
levels about twice that of a normal person.  She has devoted an entire
page on her site to the subject for those interested. 
Mercury can affect many of our body's systems, including fertility  and
thyroid  function as well. In other words, all of your hormones can be
affected by this deadly toxin. And it's important to mention that Mercury's
deadly affect on your neurons is a known IQ-lowerer. Recent news attention
has been given to mercury's ability to lower the IQ of children in the womb.
Experts estimate that about 8% of pregnant women have high enough levels to
damage (slightly) the brain of their fetus. 
So how can you best preserve your testeosterone and other hormones from the
ravages of this heavy metal?
Do not consume fish more than once or twice per week.
Most experts recommend fish only once or twice per week because of the
methylmercury content. I cover this in greater detail in my link on
Fish Safety. One story on this page is about a Discover article writer
who found that his mercury levels went very high after consuming fish.
The reason, he found out, was that he had a negative, but quite common
genetic mutation that
governs his glutathione levels.
2. Corn syrup. Avoid corn syrup. Researchers just announced that
mercury contamination is extremely common in high fructose corn syrup: 50%
of products tested by researchers were contaminated!  The issue apparently is
that there are no standards for mercury residue in hydrochloric acid and
hydrochloric acid is used to make high fructose corn syrup. NOTE: You should be safe
consuming Fish Oil as a recent Consumer Lab Study looked at over 50 fish oil
brands and found all were mercury-free.  (Fyi: PCBs and lead were also in check.)
3. Glutathione. Boost your body's glutathione levels.
Glutathione is your natural detoxification chemical. I have dedicated
a whole page, How to Naturally
Boost Your Glutathione Levels, to the subject.
4. Coriander, Parsley and Cilantro. These three herbs and spices are
known for binding easily to mercury and some experts feel these can aid in
detoxing the body from mercury, lead and other heavy metals. 
5. Watch Those Mercury Fillings. Removing mercury fillings dramatically
reduces plasma mercury levels according to a couple of studies.  Should you
remove them. Talk to your doctor and dentist about that one.
However, mercury loading looks like a potential issue, especially for those who
chew gum or grind their teeth.  One animal study showed that 12 fillings
could actually impair kidney function short term.  What if you have 2 or 3
fillings leaching out mercury over decades? That is a difficult question,
but it may have to do with your genetics: see #1.
6. Undenatured Whey. The standard wheys in most stores are loaded
with nasty excitotoxins and, just as important, do not boost your glutathione
levels as real whey does. I cover this in more detail in my link on
Whey, which is a powerful glutathione booster.
1) Food Chem Toxicology, 2008, 46:270-279
2) J Environmental Health, Jan 2009, 8:2"Mercury from chlor-alkali plants:
measured concentrations in food product sugar", Renee Dufault, et al;
Institute for Agriculture and Trade Policy, Jan 26 2009, "Much High Fructose
Corn Syrup Contaminated with Mercury New Study Finds: Brand Name Food
Products Also Discovered to Contain Mercury".
4) Reproductive Toxicology, 1991, 5(3):205-209, "Ultrastructural demonstration
of mercury in sertoli and leydig cells of the rat following methyl mercuric
chloride or mercuric chloride treatment"
5) Reproductive Toxicology, Sep-Oct 1993, 7(5):469-475, "Autometallographic
detection of mercury in testicular tissue of an infertile man exposed to mercury
6) Occup Environ Med, Aug 1994, 51(8):536–540, "Endocrine function in mercury
exposed chloralkali workers"
7) Comptes Rendus de l'Academie Bulgare des Sciencesi, 53(12):91, "Mercury
Vapour and Some Reproductive Parameters in Human"
12) Toxicol Appl Pharmacol, 1997 May, 144(1):156-62, "Mercury in saliva and feces
after removal of amalgam fillings"
13) J Dent Res, 1996 Jan, 75(1):594-8, "Long-term Use of Nicotine Chewing Gum and
Mercury Exposure from Dental Amalgam Filling"
14) AJP - Regu Physiol, Oct 1 1991, 261(4):R1010-R1014, "Mercury from dental
'silver' tooth fillings impairs sheep kidney function"