In a recent review, a group of Irish scientists (Mills. 2011) attempt to summarize all the available information on the "ever-accumulating range of bioactivities associated with milk substituents"; and the sheer size of the paper underlines that there probably is much more to milk than Arnold would have imagined.
|Table 1: Milk-derived bioactive peptides in commercially available functional foods and ingredients (Mills. 2011)|
Edit: I think it is noteworthy to say that (of course) this review was supported by the milk industry. While this does not change the reliability of the scientific evidence cited, one should keep that in mind when looking at which studies the authors selected.