>Is there a scientific basis for the claim that the casein of each
>>species is molecularly different?
>
>I think there are two ways to look at such a question.
>One is the "paleo" way, which in this case says that as all other milk than
>human milk have probably not been included in our ancestors diet in such
>a way that we can say it is a "safe" food for us.

Also, most human milk now contains bovine casein and gluten peptides.