Bad News About Pesticides
April 29, 2014
Story at-a-glance
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A new study revealed that mothers’ exposure to
organophosphate pesticides during pregnancy was associated
with lower IQ, increased risk of attention problems, poorer
cognitive functioning and other problems in their children
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Prenatal exposure to chlorpyrifos pesticide was also
associated with lower IQs and poorer working memory in
three-year-olds
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Exposure while in the womb to DDT, a pesticide banned in
1972 after close to 30 years of use, increases women’s risk
of high blood pressure decades later
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The pesticide industry pours millions of dollars into
lobbying efforts to defeat increased regulations at both the
state and federal levels; they’ve also engaged in tactics to
discredit scientists revealing pesticide dangers
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Eating organic foods as much as possible is one of the best
ways to reduce your pesticide exposure, along with not using
them in your home (including on pets or for head lice
treatment)
By Dr. Mercola
More than one billion pounds of pesticides are used in the US
each year, an amount that has quintupled since 1945. This includes
20,000 products made from varying formulations of more than 1,000
chemicals, sprayed everywhere from farm fields and gardens to
playgrounds and schools.1
It should be revealing that one commonly used type of pesticide,
organophosphates, were first developed as nerve gas during World War
II. They work by inhibiting cholinesterase, an enzyme that regulates
a key messenger in your brain called acetylcholine.
In effect, these poisons disrupt the signals between neurons, an
action that has been linked to neurodegenerative diseases like
Alzheimer's disease and Parkinson's in humans. In children, there is
increasing evidence that these pesticides are especially damaging,
not only at high exposure levels but also at low, chronic levels to
which millions are exposed.
Please understand that this article documents the damage from
pesticides that have been present for many decades. It does not go
into what many scientists, like Dr. Huber, feel is even a greater
threat, which is the
glyphosate that is being used at nearly one billion pounds per
year -- but has not been around long enough to generate this type of
data.
The CHAMACOS Study: Even Tiny Amounts of Pesticides May Harm Kids'
Brains
The recently published CHAMACOS Study followed hundreds of
pregnant women living in Salinas Valley, California, an agricultural
mecca that has had up to a half-million pounds of organophosphates
sprayed in the region per year.
The children were followed through age 12 to assess what impact
the pesticides had on their development.2
It turns out the impact was quite dramatic, and mothers' exposure to
organophosphates during pregnancy was associated with:3
- Shorter duration of pregnancy
- Poorer neonatal reflexes
- Lower IQ and poorer cognitive functioning in children
- Increased risk of attention problems in children
Writing in The Nation magazine, reporter Susan Freinkel
explained:4
"Prenatal exposure to even tiny amounts of
organophosphates—in the parts per trillion range—can have
significant impacts on the brain, the CHAMACOS study suggests.
…From infancy on, the children of the mothers with the highest
levels of organophosphates were at the greatest risk for
neurodevelopmental problems.
That association was present at every stage the
researchers checked in on the kids. At 6 months, they were more
likely to have poorer reflexes. At 2, they were at higher risk
for pervasive developmental disorder, an autism-related
condition, like Asperger's, in which children have trouble
connecting to others.
At 5, they were more likely to be hyperactive and have
trouble paying attention. At 7, they scored lower on IQ tests,
by an average of seven points—the equivalent of being a
half-year behind their peers."
Research published, ironically, the same day as the CHAMACOS
study also found that prenatal exposure to chlorpyrifos (Dursban, a
pesticide once used to control cockroaches in inner cities) was
associated with lower IQs and poorer working memory in
three-year-olds.5
A senior scientist at the Natural Resources Defense Council, who
is now an official at the California Environmental Protection Agency
(EPA) said the combination of studies come "about as close as I can
imagine to absolute proof" of the damaging effects of pesticides on
children's brains.6
Shifts to 'Softer' Pesticides Are Likely No Safer
As the dangers of organophosphates become clear, farmers have
shifted toward other supposedly safer chemicals, like neonicotinoids
and pyrethroids. The former group of chemicals is a leading suspect
behind the
massive bee die-offs occurring across the US, and the latter
have shown equally concerning health effects as organophosphates.
One study tested urine samples from 779 Canadian children, aged
six to 11, and the parents answered questions relating to their
child's behavior. Shockingly, even at that young age, 97 percent of
the children had pyrethroid breakdown products in their urine.
Ninety-one percent also had traces of organophosphate pesticides.7
A 10-fold increase in urinary levels of one pyrethroid breakdown
product as associated with twice the risk of a child scoring high
for behavioral problems, such as inattention and hyperactivity.
A previous study found that toddlers who had been exposed to
pyrethroids while in utero had lower development scores compared to
unexposed children. According to a 2006 EPA review, animal research
has also shown that even low levels of some of these compounds have
an adverse effect on:8
Immune function |
Nervous system development |
Behavioral development |
Thyroid |
Liver |
Reproductive hormones |
Some pyrethroids act as
endocrine disruptors by mimicking estrogen. Such
hormone-disrupting chemicals can either raise the levels or increase
estrogenic activity in your body, thereby promoting the growth of
estrogen-sensitive cancers such as breast cancer.
As stated by Dana Boyd Barr, a research professor of
environmental health at Emory University's Rollins School of Public
Health in Atlanta:9
"Pyrethroids are obviously a safer alternative to
organophosphates, but just because they are safer doesn't mean they
are safe."
In Utero Pesticide Exposure May Lead to Health Problems as an Adult
It's not only behavioral and cognitive troubles that have been
linked to in utero pesticide exposure. Recent research has revealed
that exposure while in the womb to DDT, a pesticide banned in 1972
after close to 30 years of use, increases women's risk of high blood
pressure decades later. Like many environmental toxins, DDT passes
freely through the placenta during pregnancy, where it gains direct
access to the developing fetus. Past studies have linked DDT to high
blood pressure, decreased fertility, premature delivery, and
diabetes in adults, but this is the first study to reveal its health
risks when exposure occurs prenatally.
The research revealed that women exposed to the most DDT before
birth were 2.5 to 3.6 times more likely to develop high blood
pressure before the age of 50 than those with the lowest prenatal
exposure.10
Although DDT has been banned in the US for decades, it still
persists in the environment, including in the food chain. And that
is just one chemical that babies are exposed to before
birth. It is this cumulative effect of numerous chemicals,
particularly to developing children, that likely poses the greatest
risks of all. Brenda Eskenazi, chief investigator of the CHAMACOS
study, noted:11
"The other thing we don't know about is the combined
effect of exposures …Throughout the course of a day, people may
eat several different types of produce, each of which may bear
traces of one or more pesticides. They encounter other types of
chemicals as well—from antibacterials in soaps, to plasticizers
in foodware, to flame retardants in the furniture… By day's end,
you've got a combination of chemicals and an unknown level of
risk."
What is known, however, is that children experience greater
exposure to chemicals pound-for-pound than adults, and though the
blood-brain barrier is fully formed at birth,12
its function may be immature, which may allow greater chemical
exposures to reach their developing brains.
Children also have lower levels of some chemical-binding
proteins, which may allow more of a chemical to reach their organs,
while systems that detoxify and excrete chemicals in adults are not
fully developed. These factors, coupled with the fact that a child
may live 80 years or more into adulthood, allowing more than enough
time for chemicals to do their damage, signal a major challenge for
kids born today. Many experts believe rising rates of birth defects,
asthma, neurodevelopmental disorders and other serious diseases in
US children are a result of these early chemical exposures,
including pesticides.
Pesticide Industry Pours Millions Into Lobbying to Defeat Tighter
Regulations
While chlorpyrifos has been banned for household use for more
than a decade, it's still widely used in agriculture – despite
efforts by farmworkers and scientists who tried to get the chemical
added as a toxicant under Proposition 65 (this California law
prohibits industry from using substances known to cause birth
defects and reproductive harm into the environment). At a
Sacramento, CA meeting to address the chemical in 2007, reporter Lee
Fang wrote:13
"Remembering that meeting in Sacramento, Margaret Reeves,
a senior scientist with the Pesticide Action Network (PAN),
recalls that people critical of chlorpyrifos 'each got one to
two minutes to speak.' Then came the scientists working for Dow
Chemical, the principal manufacturer of the chemical in the
United States. 'There were five Dow scientists, and they each
got five to ten minutes. It was mind-boggling, the preference
for their input over the victims and the consumer rights
advocates and the farmworker advocates,' says Dr. Reeves."
In the last decade, PAN has spent just over $20,000 lobbying in
Sacramento, compared to Dow's more than $1.2 million (Dow, which
manufactures Dursban and the chlorpyrifos Lorsban, generated nearly
$5 billion in profits in 201314).
As you might suspect, chlorpyrifos was not declared a toxic
substance under Proposition 65. At the national level, too, such
industry power is apparent. The chemical companies are already hard
at work to defeat pesticide measures introduced by the EPA earlier
this year, one that would evaluate the health risks of pesticide
drift from farms onto nearby areas and another that would update
pesticide safety laws for farmworkers. Fang continued:15
"…pesticide manufacturers are poised to beat back the
EPA's efforts. CropLife America—a trade group for companies
including Dow, Bayer and DuPont that spends more than $14
million a year on research and advocacy—is not only in close
communication with the EPA; it has worked with congressional
allies to block the agency's attempts at regulation. The
organization called on Representative Darrell Issa of
California, chair of the House Oversight Committee, to
investigate the administration for pursuing agricultural
regulations, including the so-called 'spray-drift' rules.
According to CropLife officials, these reforms
'unnecessarily cost farmers time, money and liability, and
significantly impact U.S. agriculture and the economy.' In
response, Issa has held multiple hearings to undermine the
EPA—under the guise of protecting 'Job Creators Still Buried by
Red Tape,' as one session relating to the EPA regulations on
pesticides was titled. …In addition to Issa's committee, a
number of GOP legislators have sponsored amendments to
appropriation bills that would block EPA action on pesticide
rules. The recently passed farm bill included a bipartisan
amendment exempting certain forms of pesticide pollution from
enforcement under the Clean Water Act."
Pesticide Maker Tries to Discredit Scientist That Linked It to
Reproductive Abnormalities
One of the most shocking displays of just how far the chemical
industry will go to protect its profits at the expense of public
health is the
story of Tyrone Hayes, whose Atrazine research turned his life
into a veritable nightmare. In the late 1990s, he conducted
experiments on the herbicide Atrazine for its maker, Syngenta. As
reported by The New Yorker:16
"...when Hayes discovered that Atrazine might impede the
sexual development of frogs, his dealings with Syngenta became
strained, and, in November, 2000, he ended his relationship with
the company. Hayes continued studying Atrazine on his own, and
soon he became convinced that Syngenta representatives were
following him to conferences around the world. He worried that
the company was orchestrating a campaign to destroy his
reputation."
Two years ago, his work on Atrazine provided the scientific basis
for two class-action lawsuits brought against Syngenta by 23 US
municipalities, accusing the chemical technology company of
contaminating drinking water and "concealing Atrazine's true
dangerous nature." Documents unearthed during these legal
proceedings revealed that Hayes' suspicions were true—Syngenta had
indeed been studying him as deeply as he'd been studying their toxic
herbicide for the past 15 years.
What follows reaches a level of creepy that no one should ever
have to endure—least of all a scientist who's working to learn and
share the truth about a widely used agricultural chemical that has
the power to affect all of us, and our ecology. The New Yorker
continued:
"Syngenta's public-relations team had drafted a list of
four goals. The first was 'discredit Hayes.' In a spiral-bound
notebook, Syngenta's communications manager, Sherry Ford, who
referred to Hayes by his initials, wrote that the company could
'prevent citing of TH data by revealing him as noncredible...'
Syngenta looked for ways to 'exploit Hayes' faults/problems.'
'If TH involved in scandal, enviros will drop him,' Ford wrote.
She observed that Hayes 'grew up in world (S.C.) that wouldn't
accept him,' 'needs adulation,' 'doesn't sleep,' was 'scarred
for life.' She wrote, 'What's motivating Hayes?—basic
question.'"
Simple Steps for Reducing Your Exposure to Pesticides
Everyone can be harmed by pesticides, but if you're a woman of
childbearing age or have young children, taking steps to reduce your
exposure is especially important. Your best bet for
minimizing health risks from pesticide exposure is to avoid them in
the first place by eating organically grown food as much as possible
and investing in a good water filtration system for your home or
apartment.
If you know you have been exposed to pesticides, the lactic acid
bacteria formed during the
fermentation of kimchi may also help your body break down
pesticides. So including
fermented foods like kimchi in your diet may also be a wise
strategy to help detox the pesticides that do enter your body.
Finally, do not use synthetic pesticides in your home or garden, or
in the form of insect repellant, lice shampoo, pet sprays, or
otherwise. There are safe and effective natural alternatives for
virtually every pest problem you come across. For example:
- Knock out roaches, ants and termites with
boric acid powder. Sprinkle some in the inner corners of your
cabinets and in the corners under your cabinets. Pests will
carry it back to their nests on their feet and kill the
remainder of the infestation. Boric acid is generally non-toxic
for animals, but you'd still be well advised to place it in
areas where your pet will not ingest or inhale it, as it kills
bugs by causing dehydration.
- Treat head lice with an old-fashioned nit
comb and essential oils of anise and ylang ylang, combined into
a spray. This has been found to be highly effective in
eliminating over 90 percent of head lice.
- Control your pet's fleas and ticks with
safe, natural pest repellents, such as:
- Cedar oil
- Natural, food-grade diatomaceous earth
- Fresh garlic -- work with your holistic vet to determine
a safe amount for your pet's body weight
- Feeding your pet a balanced,
species-appropriate diet. The healthier your dog or cat
is, the less appealing she'll be to parasites. A
biologically appropriate diet supports a strong immune
system.
- Bathing and brushing your pet regularly and performing
frequent full-body inspections to check for parasite
activity.
Copyright 1997- 2014 Dr. Joseph Mercola. All Rights Reserved.
http://articles.mercola.com/sites/articles/archive/2014/04/29/pesticide-exposure.aspx
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