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...findings, which are expected by 2014, could mark a significant change in the way doctors handle food allergies. The conventional treatment has long been no treatment at all - essentially, patients are simply advised to avoid problem foods altogether. But a growing number of studies indicate that such an approach may someday be a thing of the past. (See "The Year in Health 2009: From...
...Immunotherapy is designed to build up the body's tolerance to such "toxins" by gradually increasing patients' exposure to them over several weeks or months, says Hugh Sampson, who runs the Jaffe Food Allergy Institute at Mount Sinai. "We start at the microgram level, scale up to milligrams and may end with grams [of peanuts]," says Sampson, but he warns people not to try the program at home. "Every patient has an adverse reaction when we increase the dose," and in severe cases, the patient may need immediate medical attention. (See how to prevent illness...
...study published in January in the Journal of Allergy and Clinical Immunology, British researchers found that among 79 children who tested positive for peanut allergy in blood tests, only nine exhibited allergic symptoms upon eating peanuts. That may be because blood tests, which detect Immunoglobin E (IgE), an antibody that hunts for foreign particles entering the body, are not always accurate. Some people with moderate amounts of IgE in the blood are classified as "food sensitive"; those with larger amounts of the antibody are most likely food allergic. But the blood test doesn't distinguish between the two conditions...
...find that a fairly large population of patients are avoiding peanuts, but they don't really have an allergy," says pediatric-allergy expert David Rosenstreich of the Montefiore Medical Center in the Bronx, who was not involved in the study. Total avoidance may only exacerbate patients' sensitivity. (See TIME's special report "How to Live 100 Years...
...trace amounts of allergens, even if the main ingredients do not contain them. "Nearly 30% to 40% of food recalls are due to undeclared allergens," says Stefano Luccioli of the Office of Food Additive Safety at the Food and Drug Administration (FDA). (See how genes, gender and diet may be life extenders...