normally conducted in the GI tract.
Enzymatic hydrolysis can also be performed outside the human body,
and this is how whey protein hydrolysates are processed.
Food-grade enzymes are introduced to whey protein concentrate
or isolate thus reducing the size of the protein molecules, called peptides.
All dietary protein must be reduced (hydrolyzed)
to di and tripeptides, or free form aminos
in order to be absorbed by the body.
If you consume protein that is not hydrolyzed, like
isolates, concentrates, blends, caseins, soy and caseinates,
it must be hydrolyzed in your GI tract .
Whatever protein is not hydrolyzed down
it may not be transported into the blood
for distribution to your muscles and tissues.
It will then travel on into the colon
where it is not absorbed and becomes food for bacteria.