VYPFPGPIHN is a precursor peptide of beta-casomorphin (HY-P0179) and also an ACE inhibitor (IC50 = 123 µM). VYPFPGPIHN resists hydrolysis by peptidases associated with intestinal cell monolayers, maintaining structural integrity and ACE inhibitory activity. VYPFPGPIHN is not extensively taken up or transported by differentiated intestinal cell monolayers[1].