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Harmful pesticides found in everyday food products Mercer Island children

tested in yearlong study

By ANDREW SCHNEIDER <andrewschneider@...> Wednesday,

January 30, 2008

P-I SENIOR CORRESPONDENT

http://seattlepi.nwsource.com/local/349263_pesticide30.html?source=mypi

Government promises to rid the nation's food supply of brain-damaging

pesticides aren't doing the job, according to the results of a yearlong

study that carefully monitored the diets of a group of local children.

The peer-reviewed study found that the urine and saliva of children eating a

variety of conventional foods from area groceries contained biological

markers of organophosphates, the family of pesticides spawned by the

creation of nerve gas agents in World War II.

When the same children ate organic fruits, vegetables and juices, signs of

pesticides were not found.

" The transformation is extremely rapid, " said Chensheng Lu, the principal

author of the study published online in the current issue of Environmental

Health Perspectives.

" Once you switch from conventional food to organic, the pesticides

(malathion and chlorpyrifos) that we can measure in the urine disappears.

The level returns immediately when you go back to the conventional diets, "

said Lu, a professor at Emory University's School of Public Health and a

leading authority on pesticides and children.

Within eight to 36 hours of the children switching to organic food, the

pesticides were no longer detected in the testing.

The subjects for his testing were 21 children, ages 3 to 11, from two

elementary schools and a Montessori preschool on Mercer Island.

The community has double the median national income, but the wealth of

Mercer Island made no difference in the outcome, he said.

" We are confident that if we did the same study in poor communities, we

would get the same results, " he said. The study is being repeated in

Georgia.

The study has not yet linked the pesticide levels to specific foods, but

other studies have shown peaches, apples, sweet bell peppers, nectarines,

strawberries and cherries are among those that most frequently have

detectable levels of pesticides.

*Measuring the harm*

Lu is quick to point out that there is no certainty that the pesticides

measured in this group of children would cause any adverse health outcomes.

However, he added that a recent animal study demonstrated that persistent

cognitive impairment occurred in rats after chronic dietary exposure to

chlorpyrifos.

Death or serious health problems have been documented in thousands of cases

in which there were high-level exposures to malathion and chlorpyrifos. But

a link between neurological impairments and repeated low-level exposure is

far more difficult to determine.

" There's a large underpinning of animal research for organophosphate

pesticides, and particularly for chlorpyrifos, that points to bad outcomes

in terms of effects on *brain development and behavior*, " Dr. Theodore

Slotkin, a professor of pharmacology and cancer biology at Duke University

in North Carolina, said in the April 2006 Environmental Health Perspectives.

Lu says more research must be done into the harm these pesticides may do to

children, even at the low levels found on food.

" In animal and a few human studies, we know chlorpyrifos inhibits an enzyme

that transmits a signal in the brain so the body can function properly.

Unfortunately, that's all we know. "

Not many chemicals, including pharmaceutical products, were designed

specifically to kill mammals, which was genesis of organophosphates.

" It is appropriate to assume that if we -- human beings -- are exposed to

(this class of) pesticides, even though it's a low-level exposure on a daily

basis, there are going to be some health concerns down the road, " said Lu,

who is on the Environmental Protection Agency's pesticide advisory panel.

The EPA says it eliminated the use of organophosphates on many crops and

imposed numerous restrictions on the remaining organophosphate pesticide

uses.

Congressional concern that children were being harmed by excessive exposure

to pesticides led to the unanimous passage of the Food Quality Protection

Act. At its heart was a requirement that by 2006, the EPA complete a

comprehensive reassessment of the 9,721 pesticides* *permitted for use and

determine the safe level of pesticide residues permitted for all food

products.

" As a result, the amount of these pesticides used on kids' foods (has

undergone) a 57 percent reduction, " said Shradar, the EPA's

spokesman.

But that's not nearly enough to prevent birth defects and neurological

problems, said Chuck Benbrook, chief scientist of the Organic Center, a

nationwide, nonprofit, food research organization.

" The pesticide limits that EPA permits are far, far too high to say they're

safe. And, the reduction that EPA cites in the U.S. has been accompanied by

a steady increase in pesticide-contaminated imported foods, which are

capturing a growing share of the market, " he said.

Yet the EPA continues to insist that " dietary exposures from eating food

crops treated with chlorpyrifos are below the level of concern for the

entire U.S. population, including infants and children. "

That statement is " not supported by science, " Benbrook said.

" Given the almost daily reminders that children are suffering from an array

of behavioral, learning, neurological problems, doesn't it make sense to

eliminate exposures to chemicals known to trigger such outcomes like

chlorpyrifos? " he asked.

*What to do*

While the gut reaction of some parents might be to limit the consumption of

fresh produce or switch completely to organic food, Lu cautions not to make

the wrong decision.

" It is vital for children to consume significantly more fresh fruits and

vegetables than is commonly the case today, " he says, citing such problems

as juvenile diabetes and obesity.

" Nor is our purpose to promote the consumption of organic food, although our

data clearly demonstrate that food grown organically contains far less

pesticide residues. "

Lu says an all-organic diet is not necessary. He has two sons, 10 and 13,

and he estimates that about 60 percent of his family's diet is organic.

" Consumers, " he says, " should be encouraged to buy produce direct from the

farmers they know. These need not be just organic farmers, but conventional

growers who minimize their use of pesticides. "

Understanding how fruits and vegetables grow can help guide the consumer, he

says.

For example, organic strawberries probably are worth the money because they

are a tender-fleshed fruit grown close to the dirt, so more pesticides are

needed to fight insects and bugs from the soil. He adds apples and spinach

to his list.

" It may also be money-smart to choose conventionally grown broccoli because

it has a web of leaves surrounding the florets, resulting in lower levels of

pesticide residue, " Lu says.

He is greatly concerned about one finding from the study.

" Overall pesticide (marker) levels in urine samples were even higher in the

winter months, suggesting children may have consumed fruits and vegetables

that are imported. The government needs to ensure that imported food comply

with the standards we impose on domestic produce, " he said.

*Dangerous science*

Chlorpyrifos, made by Dow Chemical Co., is one of the most widely used

organophosphate insecticides in the United States and, many believe, the

world.

For years, millions of pounds of the chemical insecticide were used in

schools, homes, day care centers and public housing, and studies show that

children were often exposed to enormously high doses. Just as the EPA was

ready to ban the product, which analysts said would have damaged Dow's

overseas sales, the company " voluntarily " removed it from the home market.

Yet, with few exceptions, the agricultural uses continued.

The EPA's Web site is a study in contradictions when it comes to

chlorpyrifos.

At one section, it " acknowledged the special susceptibility and sensitivity

of children to developmental and neurological effects from exposure to

chlorpyrifos. "

But in another section, the agency reports that infants and children face no

risk from eating food crops treated with chlorpyrifos. However, the agency

doesn't say how it reached that conclusion. There is no agreement of how

much of the neurotoxin is too much.

Benbrook said the EPA has refused orders from Congress to study the

cumulative developmental risk to children from low-dose exposures.

" Perhaps we can rest assured that EPA has protected us adults from acute

insecticide poisoning risk, but our kids are on their own, " Benbrook said.

[image: chart]

ABOUT THE STUDY

Chensheng Lu's study was published this month in Environmental Health

Perspectives (ehponline.org) <http://ehponline.org%29/>, a publication of

the National Institute of Environmental Health Science. It was funded by the

Environmental Protection Agency and used federal laboratories to confirm the

accuracy of his findings.

Unlike many previous studies, Lu's team focused on children living in an

urban/suburban area who were tested for multiple days in each of the four

seasons with urine and saliva sampled twice a day.

The organic produce was sent to the Department of Agriculture lab in Yakima

to be tested for pesticides. The Centers for Disease Control and Prevention

tested the urine samples and the Food and Drug Administration laboratory is

completing its quantification of pesticide residues in samples of the

conventional food the children consumed.

The team included scientists from Emory University, the CDC and the

University of Washington.

*P-I senior correspondent Schneider can be reached at 206-448-8218

or andrewschneider@.... >>*

--

Koh Ming Wei

Hawaii Sustainable Education Initiaitve

PO BOX 107

Paauilo HI 96776

808 443-9231 (cell)

" I don't teach subjects, I teach children " - Navarre