When you are first starting Ready, Set, Food! with your baby, we recommend adding the daily pre-measured packets to your child's bottle, or mixed into solid food, at the beginning of the day to better monitor how your baby is reacting to the introduction of the allergens. A reaction can occur immediately, and almost always within 2 hours after consumption.
We also recommend starting Ready, Set, Food! when your baby is well and not under the weather so you can better gauge your baby's reaction to the allergen introduction system. For example. if your baby is still getting over a cold, or toothache, etc. wait until baby is feeling better.