Hi Philip;

The excerpt below is like a smoking gun - or is it? Like high cholesterols 
levels and cardiovascular disease (ie 50% association with CVD), is it 
(external betacellulin in the blood) necessarily an indicator of potenial 
carcinogenesis? Does the body exert a tight control over betacelulin levels 
in the blood and normalize them?

Marilyn

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"You might think that protein shearing enzymes in your gut would breakdown
betacellulin and other hormones belonging to the EGF hormonal family before
they can get to the gut EGF receptor.  However, this is not the case, as
cow's milk contains peptidase inhibitors which allow EGF to remain intact
even in human digestive juices of the stomach and small intestine (11)."

11. Rao RK, Baker RD, Baker SS.  Bovine milk inhibits proteolytic
degradation of epidermal growth factor in human gastric and duodenal lumen.
Peptides. 1998; 19(3):495-504.