Abstract
Protein hydrolysates bioactivity makes them suitable for functional food ingredients. However, their chemical reactivity with different molecules, mainly reducing sugars, might lead to a modification of their structure, and thus function, after their inclusion into food matrices. The effect of food matrix and the storage time on the antihypertensive and antioxidant capacity of sardine hydrolysates was evaluated. Furthermore, bioactivity remaining after simulated gastrointestinal digested samples was also analyzed to verify its potential to be administrated orally. Sugar containing matrix improved the ACE inhibitory and DPPH radical scavenging activity of hydrolysates after thermal treatment and storage up to 80%. Maillard reaction products were responsible for the changes observed in the bioactivity of enriched food. Digested samples showed different but still adequate bioactivity depending on the matrix containing the hydrolysate. These results support the potential of fish protein hydrolysates to be used as ingredient in food formulation.
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