Food Allergies Linked to Pesticides

Common food allergies in childrenEnvironmental pollution and the occurence of food allergies in the United States are on the rise. According to the Center for Disease Control and Prevention (CDC) an increase in food allergies of 18 per cent was seen between 1997 and 2007.

The increased use of pesticides and other chemicals in the environment is associated with a higher prevalence of food allergies according to a study published in the December issue of the Annals of Allergy, Asthma, and Immunology. Elina Jerschow, assistant professor of allergy and immunology at the Albert Einstein College of Medicine in New York said: “Our research shows that high levels of dichlorophenol-containing pesticides can possibly weaken food tolerance in some people, causing food allergy. ”

What are Dichlorophenols?

Dichlorophenols are widely used as pesticides and for chlorination of water. Researchers have found that people exposed to high levels of dichlorophenols, the chemical added to water to ensure it is free of bugs, tend to be more prone to food allergies. It doesn’t mean that people should stop drinking tap water to avoid dichlorophenols exposure. Even those who opted for bottled water instead of tap water could ingest the pesticide chemical from eating pesticide-treated fruits and vegetables, fruit juices and foods. This chemicals are also commonly found in pesticides used by farmers and consumer insect and weed control products.

How dichlorophenols affect our environment?

Dichlorophenols have a strong antibacterial effect that could affect microflora in the environment. Dichlorophenols are a kind of chlorine that are known to kill bacteria. A new study reported in the December issue of Annals of Allergy, Asthma and Immunology support the hypothesis that high levels of dichlorophenols can alter the population of microbes within the human body, which can affect the way that the body react to food. According to the study urine dichlorophenols level at the 75th percentile and above were associated with the presence of sensitization to foods. Excessive use of dichlorophenols may contribute to the increasing incidence of food allergies in westernized societies.

Jerschow said the research is still too preliminary to suggest that Americans should change  their eating or drinking habits.

Most common food allergens

The egg, milk, fish, shellfish, tree nuts, peanuts, soy, and wheat make up 90 percent of food allergies. Symptoms can range from mild rash to a life-threatening anaphylaxis. The American College of Allergy, Asthma and Immunology (ACAAI) recommends everyone with known food allergy to always carry two doses of allergiest prescribed epinephrine. The delay in using epinephrin can lead to death.

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Danger of “antibacterial”

Bio-Tag - Triclosan

An antibacterial chemical, called Triclosan, found in toothpaste and other personal care products may increase the risk of allergy development in children. Triclosan has been used since 1972, but was recently associated with allergies in children.

What is Triclosan?
Triclosan is an antibacterial, antifungal and antiviral agent. Triclosan has been in use for decades in a variety of common household products, including soaps, deodorants, toothpastes, mouthwashes, dish detergents, hand sanitizers, cleaning supplies, and toys. It is also a component in some pesticides, mattresses, insulation and underlayments used under flooring such as laminate, wood, carpeting in order to stop the growth of bacteria, fungi, and mildew. In the United States, manufacturers of products containing triclosan must indicate it on the label.

How can Triclosan affect our health?
Triclosan can change the bacterial flora in the mouth, on the skin and in the intestines. The change in the delicate balance between beneficial and “bad” bacteria in the body can lead to immune system dysregulation, causing an increased risk of developing allergies (hygiene hypothesis). The researchers found link between the growing incidence of allergies and the increased use of products containing triclosan. The study does not demonstrate that the antibacterial chemicals themselves cause the allergies but instead suggest that they play a significant role in immune system development. Several studies have shown that triclosan may alter hormone regulation in laboratory animals or cause antibiotic resistance.
According to the FDA, triclosan is not currently known to be hazardous to humans, but a number of scientific studies emphasize the need to review the manufacturer’s guidelines on the use of this chemical in consumer products.

About the study
Researchers have found that children with high urinary levels of triclosan have a twofold higher risk of environmental and food allergies. The higher urinary levels of the chemical were associated with increased levels of Immunoglobulin E (IgE) antibody, which is elevated in the blood of people with allergies. According to the study the probability of food and aeroallergen (especially rhinitis) sensitization is significantly higher with increased exposure to triclosan.
Comparison of the Norwegian and U.S. summary of the studies show approximately 50 per cent of the Norwegian children had detectable levels of triclosan in their urine, while 80 per cent of American children had measurable levels. Children from both groups had approximately the same amount of triclosan exposure.
The triclosan study is a collaboration between the Norwegian Institute of Public Health, Oslo University Hospital and the National Institute of Health Sciences (NIEHS) in the U.S. The study was published online on November 2012 in Allergy, the official journal of the European Academy of Allergy and Clinical Immunology.

What is the problem with Triclosan?
Triclosan is linked to inhalation and liver toxicity. Low levels of triclosan may disrupt thyroid function. Due to the uncompleted waste water treatment, the chemical, which is very toxic to aquatic life, ends up in our lakes, rivers and water sources.

How to avoid Triclosan?
There is no evidence that household use of antibacterial products provides benefits over plain soap and water, and the American Medical Association recommends that triclosan not be used in the home, as it may encourage bacterial resistance to antibiotics.

Watch the label for triclosan (and triclocarban) in personal care products. Read ingredient labels carefully.

Avoid “antibacterial” products.  Triclosan is used in everyday personal care products like toothbrushes, toys, plastic containers, and cutting boards that may be labeled “antibacterial,” or make claims such as “odor-fighting” or “keeps food fresher, longer”.              

Use simple detergents and soaps with short ingredient lists and avoid antibacterial products with triclosan for home use.

Triclosan can be found in these products: soap and dishwashing liquid, towels, mattresses sponges, personal care products, shower curtains, toothbrushes, phones, kitchenware, and plastic food containers, shoes, flooring, and carpets, cutting boards, clothing, fabrics, and toys.

References:

http://www.epa.gov/oppsrrd1/REDs/factsheets/triclosan_fs.htm

http://www.jacionline.org/article/S0091-6749(11)02347-5/fulltext