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US Medical Guide
Free Press . . Allopathic and Alternative Health News
Originally Published, Dallas Medical Guide 1991

Allergy vs Food Sensitivity
by Susan Turner
Medical Journalist

Do you suffer from fatigue, insomnia, stiffness, pain, digestive disturbances, asthma, sneezing, skin irritation, or other symptoms of unknown origin?

The solution to the problem, according to Hal Douglas, M.D.,  may be found in your blood stream. The culprit may either be an allergy or a hypersensitivity (delayed allergic reaction) to either environmental substances or food.

Dr. Douglas, internal medicine and adult allergy specialist at Medical Arts in Dallas, Texas, explains there is a difference between hypersensitivity and allergy, although symptoms may be similar.  He estimates that while only five percent of the population demonstrate a food allergy, 95 percent may suffer from sensitivity to food.

Food hypersensitivity, says Dr. Douglas, is the health tragedy of the 90's, and it is often overlooked. Because symptoms are generally delayed (several hours to several days following the ingestion of food), there is often no correlation made between the 
two. For example, an individual may not relate the green pepper he had for lunch yesterday with his insomnia tonight or his fatigue tomorrow.

On the other hand, a food allergy normally produces an immediate reaction, and the correlation is much more apparent.he says. If someone eats a strawberry and breaks out in a rash, there 
is strong likelihood of allergy.

In pointing out that more people have allergies to environmental substances, 
Dr. Douglas estimates that approximately 40 percent of people with symptoms are allergic to inhalants  the most common being house dust, molds, animal dander, trees, grass, and weeds.

Curiously enough, he says, 60 percent of new patients will demonstrate 
allergic symptoms to environmental substances, but will not test positive. The cause here may be hypersensitivity, determined by another blood test.

Dr. Douglas, a member of AIAIS (American In-Vitro Allergy/Immunology 
Society) explains that allergies can be specifically determined by the quantitative measurement of IgE a protein in the blood stream which is elevated in allergic or atopic states. Although Dr. Douglas does not discount skin testing (sole diagnostic procedure still employed by some allergists,) he says he is a proponent of research which concludes that blood serum testing is more effective and offers less risk to the patient.

Dr. Douglass, says that allergies can be specifically determined by RAST blood testing (Radio Allergio Sorbent Test) drawing a solitary blood sample rather than undergoing the arduous skin testing procedures. The RAST procedure has proven to be an accurate measure of specific
IgE antibody a protein in the blood which is elevated in allergicor atopic stages. The advantages of the RAST make it highly appealing in terms of safety, comfort, and convenience.

"Due to its preciseness," says Dr. Douglass, "The RAST helps identify patients who would benefit from immunotherapy. This form of testing enhances the ability of direct information about the treatment regimen that would most likely produce successful results without injurious side effects.

According to ongoing research by the AIAIS, for more than 20 years, and confirmed by a 1982 study of the In-Vitro Tests Committee of the American Academy of Allergy and Immunology, in-vitro (blood) testing can demonstrate a sensitivity to 90 percent and specificity close 
to 100 percent.

"What this means to a patient," says Dr. Douglas, "is that the existence of an allergy or lack thereof can be immediately confirmed without a drawn out procedure or false positives, often 
acquired in  skin testing diagnostic procedures.  Because the test indicates the person's degree of sensitivity to a substance, treatment is more effective in that the appropriate allergen and dose can be administered immediately. A person can be immunized in 20 to 24 hours. With treatment, allergies are often curable. I have seen patients with the most severe allergies stop serum after two years."

Blood testing for food hypersensitivities is described by Dr. Douglas as a breakthrough for diagnosing and treating symptoms of unknown origin. When food antigens are incubated with a patient's blood sample, it is possible to measure volumetric shifts in white blood cells.

He cites, for example, that persons with irritable bowel syndrome, bloating, gas, abdominal pains, loose motions and fatigue  may show cellular  reaction in the blood to such extracts as potatoes, milk, wheat, yeast, and beef. The test is confirmed by a food challenge. If the blood reacts, offending foods are withdrawn from the diet, and gradually added back one at a time.

This diagnostic procedure, according to Dr. Douglas, has proved beneficial in alleviation of such symptoms as fatigue, insomnia, irritable bowel syndrome, eczema and skin irritations, migraine headaches, asthma and sinus conditions, joint pain and stiffness.

©2008, US Medical Guide, Susan and Terry Turner

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