It's the opposite. Usually babies don't eat any food at 4 months. They only get breastmilk or formula. The advice is to start early with peanutbutter and egg.

It's the opposite. Usually babies don't eat any food at 4 months. They only get breastmilk or formula. The advice is to start early with peanutbutter and egg. In our case diary products were an issue instead of nuts. My daughter would get very sick from anything that had diary in it, even if my wife ate diary products while breastfeeding. But at about 1.5 years one she got over that and now at 4 she is completely fine drinking normal cow milk. So allergies in kids are not a permanent set in stone thing. They can get over some, and early exposure makes a difference.