It is argued that formula does not have the same effect on the immune system, but steps can be taken to provide the proper immune building nutrients to the formula - fed baby. (babygaga.com)
The Vitamin D from the sun, the interaction with the varied microbial environment of the soil for immune building, and the interaction with our food supply. (wellnessmama.com)
I got a third opinion and put my son on immune building supplements along with using a garlic oil ear drop. (foodrenegade.com)