Allergy Introduction and Warning Signs
The one food at a time rule is the foundation of safe allergy introduction. Offer a single new ingredient for 3 full days before adding anything else. This window lets you identify which food caused a reaction.
Common allergenic foods include eggs, peanuts, tree nuts, fish, wheat, and dairy. Current evidence suggests gradual early introduction, rather than delay, may reduce allergy risk. If there is a family history of allergies, discuss the order of introduction with your doctor before starting.
Watch for these warning signs after any new food:
- Hives, redness, or a rash around the mouth or on the body.
- Swelling of the lips, tongue, or face.
- Vomiting or sudden diarrhoea shortly after eating.
- Wheezing, coughing, or difficulty breathing.
- Unusual irritability or limpness.
Stop the food immediately if any of these appear and seek medical attention. Report adverse events to your healthcare provider or the relevant regulatory authority.