As evidence grows that gut bacteria play roles in the development and persistence of food allergies, researchers begin to explore microbe-based interventions.

With her husband, she studied allergic reactions and identified antibodies that set off itching, wheezing, and rashes.

Four years after taking a probiotic and peanut protein for 18 months, two-thirds of children in a small clinical trial can eat peanuts with no health issues.

Egg and peanut consumption during infancy is linked to lower risk of allergy to those foods later in life, according to a meta-analysis.