Nearly 1 in 5 Think They Have Food Allergy, But Just 1 in 10 Suffer Genuine Reactions: Study

Approximately just over 10 percent of American adults are estimated to have food allergies, but twice as many believe they do have food allergy mistakenly, finds a new study.

According to a new study around one in ten people in the U.S. are estimated to have food allergy while nearly twice that number mistakenly think themselves to be food-allergic. The findings of the study are published in the journal JAMA Network Open.

Over 26 million are estimated to have a food allergy. However, researchers found that 19 percent of adults think they are currently food allergic, although their reported symptoms are inconsistent with a true food allergy, which can trigger a life-threatening reaction.

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‘Food allergies have been on the rise in America for years. The survey's data revealed that shellfish is the top food allergen in adults which commonly begins in adulthood.’
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Results are based on a nationally representative survey of over 40,000 adults.

"While we found that one in 10 adults have food allergy, nearly twice as many adults think that they are allergic to foods, while their symptoms may suggest food intolerance or other food-related conditions," says lead author Ruchi Gupta, MD, MPH, from Lurie Children's, who also is a Professor of Pediatrics at Northwestern University Feinberg School of Medicine. "It is important to see a physician for appropriate testing and diagnosis before completely eliminating foods from the diet. If a food allergy is confirmed, understanding the management is also critical, including recognizing symptoms of anaphylaxis and how and when to use epinephrine."

Researchers discovered that only half of adults with convincing food allergy had a physician-confirmed diagnosis, and less than 25 percent reported a current epinephrine prescription.

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Researchers also found that nearly half of food-allergic adults developed at least one of their food allergies as an adult.

"We were surprised to find that adult-onset food allergies were so common," says Dr. Gupta. "More research is needed to understand why this is occurring and how we might prevent it."

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The study data indicate that the most prevalent food allergens among U.S. adults are shellfish (affecting 7.2 million adults), milk (4.7 million), peanut (4.5 million), tree nut (3 million), fin fish (2.2 million), egg (2 million), wheat (2 million), soy (1.5 million), and sesame (.5 million).

"Our data show that shellfish is the top food allergen in adults, that shellfish allergy commonly begins in adulthood, and that this allergy is remarkably common across the lifespan," says Dr. Gupta. "We need more studies to clarify why shellfish allergy appears to be so common and persistent among U.S. adults."

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Source-Eurekalert