Children with Cow Milk Allergy may tolerate heated milk, probably because high temperature destroys the milk proteins that trigger allergic reactions.

It is what has been found by a US group of researchers, that examined the presence of an allergic reaction in one hundred children, aged 2-17 years, with cow milk allergy following ingestion of heated milk.
In particular, researchers challenged cow milk allergic children for three months with heated milk products, monitoring the eventual allergic reaction. Then, children were challenged again with unheated milk, to see if the allergic reaction to unheated milk was still present.

Results showed that 68% of children were tolerant to extensively heated milk but not to unheeated milk, 9% were tolerant to both heated and unheated milk and only 23% showed an allergic reaction to heated milk.

Source: the Journal of Allergy and Clinical Immunology Back