Is your baby at risk for food allergies? It's a question that worries many new and expectant parents as food allergies become more common.

Researchers are developing a blood test for peanut allergies that could eliminate the need for sometimes risky and costly oral food challenges. A new blood test could make diagnosing peanut allergies a safer and cheaper process.

The big problem is that most parents don't know if their child has a food allergy until they try a food for the first time and have a reaction. That's why it's important for parents, teachers, babysitters, etc. to be alert to the signs of a food allergy.