A pregnant mom's diet matters.
Strengthening your kid's stomach could start even before they leave the womb: Expecting moms can kick start allergy prevention for their babies by sticking to a healthy lifestyle themselves. "Pregnant and breastfeeding women should [eat] a varied diet including whole grains, white meats, fish, fruits, and vegetables," says Nowak-Wegrzyn. Research shows pregnant women and even nursing moms with strong digestive tracts and a healthy gut flora pass down their good probiotic flora to their babies. Furthermore, eating more nuts also seems to protect babies from developing a nut allergy, as one study published in JAMA found. Early exposure to allergens could up a baby's tolerance, especially in the first year of life. Dr. Supinda Bunyavanich, also at Mount Sinai, adds that you should "continue to add to this variety of foods so that your child's diet becomes increasingly diverse as he or she gets older."