Functional, bioactive and antigenicity properties of blue whiting protein hydrolysates: effect of enzymatic treatment and degree of hydrolysis.

Background: Fish discards represent an important under-utilisation of marine resources. This study evaluated the up-grading of the protein fraction of blue whiting (Micromesistius poutassou) discards by the production of fish protein hydrolysates (FPHs) exhibiting functional, antioxidant, angiotensin-I converting enzyme (ACE)-inhibitory and antigenicity properties.

Results: FPHs with low DH (4%) showed better emulsifying, foaming and oil binding capacities, particularly those obtained using only trypsin.