Emma has a six-month-old son, David, and a three-year-old son, Ben. Ben is allergic to cow's milk and peanuts. Emma is breastfeeding David and wants to know if there is anything she can do to prevent him developing a food allergy.

• What questions would you ask Emma?
• What advice would you give Emma regarding cow's milk for David?
• When ideally can any child (including one not expected to have an allergy to cow's milk) be given cow's milk as a main drink?
• What alternatives to cow's milk are available? Whose advice should Emma seek before starting David on non-breast milk?
• What are the symptoms of peanut allergy?
• Assuming that both of Emma's boys are allergic to peanuts, how can peanuts best be avoided? How can she ensure that the foods she gives to her sons are nut free? Remember to consider food eaten at home, homemade food and food eaten out, including at parties