Introduction:

Legumes and pseudocereals protein hydrolysates have been recognized as having improved potential health-promoting properties as compared with native proteins.

Objectives:

1) Produce bioactive hydrolysates from lupin and faba bean proteins by enzymatic hydrolysis (EH) and solid-state fermentation (SF), 2) compare the angiotensin converting enzyme (ACE)-inhibitory and antioxidant activities of the hydrolysates and 3) evaluate the effect of in vitro gastrointestinal digestion on the antioxidant and antihypertensive activities of the hydrolysates.

Methodology:

Hydrolysates from proteins of faba bean (Vicia faba) and lupin (Lupinus gredensis) were obtained by EH using Flavourzyme and SF by Aspergillus niger. The antioxidant and ACE-inhibitory activities of the hydrolysates were assessed.

Results:

All the hydrolysates presented DPPH radical scavenging activity, with IC50 ranging from 1.23-2.08 mgprotein·mL-1. Only EH and SF hydrolysates obtained from lupin proteins had ACE-inhibitory activity (IC50: 2.39 and 14.08 mgprotein·mL-1, respectively). Radical scavenging activity hydrolysates was significantly reduced after in vitro gastrointestinal digestion, while ACE-inhibitory activity showed variable behavior.

Study limitations:

Specific molecules responsible for the in vitro health-promoting properties should be identified.

Originality:

Relevant information is provided on health-promoting attributes of faba bean and lupin hydrolysates obtained by EH and SF.

Conclusions:

EH and SF improved the health-promoting properties of faba bean and lupin native proteins.

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