Environmental Chemicals Like BPA May Have Serious Reproductive
Effects
Bisphenol-A (BPA) is one of the world's highest production-volume
chemicals and as a result of its widespread use has been found in
more than
90 percent of Americans tested. BPA is an endocrine disrupter,
which means it mimics or interferes with your body's hormones and
"disrupts" your endocrine system.
The glands of your endocrine system and the hormones they release
influence almost every cell, organ, and function of your body. It is
instrumental in regulating mood, growth and development, tissue
function, metabolism, as well as sexual function and reproductive
processes.
The strongest evidence showing that exposure to environmental
chemicals like BPA can lead to disruption of endocrine function
comes from bizarre changes seen in a number of wildlife species,
such as
intersex fish, frogs developing a variety of defects like
multiple testes or ovaries, and hermaphrodite bears, just to name a
few.
But evidence is also very strong showing these chemicals are
influencing humans, too, and leading to decreased sperm quality,
early puberty, stimulation of mammary gland development, disrupted
reproductive cycles and ovarian dysfunction, among
numerous other health problems, like cancer and heart disease,
as well.
In the latest study, researchers found disruptions to egg
development after rhesus monkeys, which have human-like reproductive
systems, were exposed to either single, daily doses of BPA or
low-level continuous doses. The BPA appeared to damage chromosomes,
which could lead to spontaneous miscarriage or birth defects.
In the group exposed continuously to BPA, there were not only
problems with initial egg development, but also in the fetal
eggs that were developing.1
The fetal eggs were not "packaged" properly in the follicles, which
means they would have difficulty developing and maturing normally.
Washington State researcher Patricia Hunt noted:2
"The concern is exposure to this chemical that we're all
exposed to could increase the risk of miscarriages and the risk
of babies born with birth defects like Down Syndrome. The really
stunning thing about the effect is we're dosing grandma, it's
crossing the placenta and hitting her developing fetus, and if
that fetus is a female, it's changing the likelihood that that
female is going to ovulate normal eggs. It's a three-for-one
hit."
Similar results have been revealed in humans, as women undergoing
in vitro fertilization who had higher levels of BPA in their blood
had 50 percent fewer fertilized eggs, according to one study, which
suggests the chemical is compromising the quality of women's eggs
and perhaps contributing significantly to fertility problems.3
You May be Impacted by Your Great-Grandmothers' Chemical Exposures
The statement that "no man is an island" is coming all the more
true now that we're seeing regular evidence that our health is
intricately tied to the lives of not only our parents but also our
grandparents and great-grandparents …The chemical exposures that
we're seeing today have the potential to impact your health for
sure, but they are also likely changing future generations to come,
even if they're not directly exposed to the chemical.
One recent study found that pregnant rats exposed to dioxin,
a known carcinogen and endocrine disruptor, passed on diseases to
their third-generation offspring (or great-grandchildren) via
epigenetic transgenerational inheritance, cellular changes that
influence the expression of various genes.4
The great-grandkids had high rates of kidney disease, ovarian
disease and early-onset of puberty, while males had changes in
sperm.
As Scientific American reported:5
"Scientists have long known that environmental exposures
can cause genetic mutations. But now epigenetics experts are
finding that some exposures seem capable of changing how genes
are expressed, or turned on and off, without actually damaging
the genes. These changes then can be inherited by future
generations.
… 'The cause of the higher rates of disease in these
[third generation] animals was not due to direct exposure, but
rather through transmission of changes in the code that
regulates gene expression,' said Abby Benninghoff, who
specializes in epigenetics at Utah State University. She was not
involved with the study."
BPA is Disturbingly Common
Thanks to the U.S. Food and Drug Administration's (FDA)
refusal to ban BPA from food packaging in the United States, the
chemical will continue to experience steady growth in 2012, with an
estimated 4.7 million tons set for production this year. This, in
turn, will earn BPA manufacturers a handsome profit of $8 billion.6
So even though some forward-thinking manufacturers have removed
BPA from their products, this chemical is still disturbingly common
in food and drinks packaging, as well as in other places you
probably wouldn't expect, like thermal printer receipts. So we are
all lab rats, in a sense, being subjected to BPA exposures with
unknown consequences for ourselves and future generations, whether
we like it or not. This is why it's so important to boycott the
common sources of BPA that you can control, such as:
- Canned foods and soda cans
- All BPA-containing plastics
- Certain tooth sealants
- Certain BPA-free plastics (which can contain similar
endocrine-disrupting chemicals)
- Thermal printer receipts and paper currency (while you can't
"boycott" these, seek to limit or avoid carrying receipts in
your wallet or purse, as it appears the chemical is transferring
onto other surfaces it touches. It would also be wise to wash
your hands after handling receipts and currency, and avoid
handling them particularly if you've just put lotion or have any
other greasy substance on your hands, as this may increase your
exposure)
In addition, one way to help protect yourself from the adverse
effects of inevitable BPA exposure is by eating traditionally
fermented foods, such as raw grass-fed organic kefir, organic
fermented veggies like sauerkraut or kimchi, or taking a
high-quality probiotic supplement. These foods contain "friendly
bacteria," some of which have the ability to break down BPA, as well
as reduce your intestinal absorption of it.7
This is important for everyone, but if you're pregnant, nursing
or planning to become pregnant, avoiding BPA as much as possible
becomes all the more crucial.
Switching to BPA-Free Products May Not be Enough …
As a result of widespread consumer backlash, many companies have
rolled out "BPA-free" plastic products, ranging from bottles and
sippy cups to reusable water bottles, meant to appeal to those
health-conscious consumers looking to avoid toxins.
Unfortunately, this may be just a ruse, as studies now show
another bisphenol, bisphenol-S (BPS), is now showing up in human
urine concentrations at levels similar to those of BPA.8
This suggests that many manufacturers are simply swapping one
bisphenol for another. Research suggests BPS has similar
hormone-mimicking characteristics as BPA, but it may be
significantly less biodegradable, and more heat-stable and
photo-resistant, which means it may cause even more health and
environmental damage over time.
If you're interested in avoiding any number of chemical toxins
leaching into your food and beverages, choose glass over plastic,
especially when it comes to products that will come into contact
with food or beverages, or those intended for pregnant women,
infants and children. This applies to canned goods as well, which
are a major source of BPA (and possibly other chemicals) exposure,
so whenever you can, choose jarred goods over canned goods, or opt
for fresh instead. Another good idea is to ditch plastic teething
toys for your little ones and choose natural wood or fabric
varieties instead.
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