<I wondered how this worked for milk allergy. Apparently milk allergy works by the same rules. Breastmilk is FAR better than any formula when you're at risk for a food allergy, and the lactating mother should not have ANY dairy products in her diet (including things like sodium caseinate in processed food, etc.) However, if the baby shows signs of an allergic reaction even to breastmilk (rare, but it happens) then you'll have no choice but to switch to a completely milk-free formula. (Be careful about reading the ingredients! Soy-based isn't always the same as milk-free.)> I had to respond to this. I am a La Leche League Leader and I have nursed four of my own babies. It is absolutely impossible for a baby to be allergic to his mother's milk. Babies with galactosemia, a rare metabolic disorder in which the infant totally lacks the enzyme lactase, cannot drink their mother's milk or any milk, but this is not allergy related. The proteins in human milk are entirely compatible with human babies. Every mammal makes the milk that is perfect for their own babies. Cow's would not do very well on human milk; there would not be enough protein for growth. Humans are the only mammal that drinks milk after the age of weaning and that drinks the milk of another species. This is not something nature intended. Hence, autoimmune diseases, diabetes,, etc... It's hard in this society when most of us are brought up believing (thanks in large part to the advertising of the American Dairy Industry) that cow's milk is good for humans. This is simply not so. I have an article entitled, "Dairy: It Does NOT Do A Body Good." If anyone would like a copy, e-mail me your address and I'd be happy to send it. Kim