Stability of the RBP during in vitro digestion by gastrointestinal enzymes were not significantly changed after digestive pepsin and trypsin. In addition, cytotoxicity tests against human cancer cell lines effects of the RBP was shown inactive all cell. Thus, peptides from rice bran exhibited a potential in vitro antihypertensive activity.
The results of this study showed that rice bran was a promising protein source for the production of ACE inhibitory peptides as materials for antihypertensive functional foods.