While we would always advise that you consult with your pediatrician, you should feel comfortable still introducing Ready. Set. Food! to your baby even with an intolerance to one of the top 3 allergens - peanut, egg, and milk. Both food allergies and food intolerances can make someone feel unwell, and it can sometimes be difficult to tell the difference between a food allergy and food intolerance.
Food intolerance is defined as an unfavorable reaction to food that does not involve the immune system. One well-known example would be lactose intolerance, which is due to an enzyme deficiency. Food intolerances are typically mild conditions that do not carry the same risk as food allergies or whole-body immune system reactions.
We use very small amounts of each food in our packets, so even if your baby has an intolerance to any of the 3 foods (such as cow's milk), it is still gentle enough to use. The protein amounts we use are equivalent to less than 1 teaspoon of yogurt or cow’s milk, 1/8th teaspoon of peanut butter, and 1/250th of a cooked egg.
If your baby has a confirmed food allergy it's very important to note that Ready. Set. Food! is not to be used to treat existing food allergies. If you aren't sure if your baby has an intolerance or an allergy, you should speak to your pediatrician.