Peanut allergies have the potential to be airborne, and foods containing peanuts are not allowed in St. Mary's classrooms, and are not served in the hot lunch program.

People with peanut allergies are generally also advised to avoid tree nuts as cross-contamination is common, and people with peanut allergies are more likely to develop tree nut allergies.

Many unsafe foods for those with peanut allergies do not actually have peanuts as ingredients, but are made in a facility or on machinery that also processes peanuts. The following foods to watch out for can either contain peanuts or be cross-contaminated by peanuts.