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When Allergies start

Waiting to expose a baby to cereal until six months may increase the risk that the infant will become allergic to wheat, a study suggests.

Researchers followed 1,612 children from birth until an average age of 4 1/2. Of the 16 children who developed a wheat allergy, 12 had not received cereal grains until they were older than 6 months.

“The common sense out there is that delaying the introduction of cereals would be beneficial,” said Dr. Jill M. Norris, professor of epidemiology at the University of Colorado School of Medicine. “But actually, it may not protect against allergies.”

The scientists suggest that immune tolerance develops in a specific time interval, and not later, or that larger portions given to older children may provoke allergy rather than tolerance. The results are in the June issue of Pediatrics.

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