A study that upended medical practice by recommending feeding babies peanut products early to prevent allergies has had a big effect in the real world. About 60,000 children have avoided developing potentially life-threatening allergies after such guidance was first issued in 2015. A new study in the medical journal Pediatrics found that peanut allergies in children ages 0 to 3 declined by more than 27% after guidance was first issued, and by more than 40% after it was expanded in 2017. For decades, doctors had recommended delaying feeding children peanuts and other foods likely to trigger allergies until age 3.
