Pasta Enrichment with an Amaranth Hydrolysate Affects the Overall Acceptability while Maintaining Antihypertensive Properties

Abstract

Background: Alcalase-treated amaranth proteins generate angiotensin-1-converting enzyme (ACE-1) inhibitory peptides, which could be useful for functional foods development. Our aim was to evaluate the technological, sensory, and antihypertensive properties of pasta enriched with an amaranth hydrolysate. Methods: Pasta with 11% (A; control), 15% (B), and 20% (C) of protein content were formulated. Pastas B and C were supplemented with an alcalase-treated amaranth protein concentrate. Cooking time, cooking lost, color, and texture were assessed. An untrained panel (n = 30) evaluated sensory attributes. The antihypertensive effect was evaluated in hypertensive rats. Results: The hydrolysate IC50 was 0.014 mg/mL. Optimum cooking time and cooking loss decreased in products B and C vs. A (p < 0.05). The L* values decreased in pasta C. Firmness increased in pasta C vs. A (p < 0.05). Adhesiveness was different among groups (p < 0.05). Pasta A had the highest acceptability (p < 0.05). The products B and C, and captopril (positive control) showed antihypertensive properties after 3 h of supplementation (p < 0.05). This effect remained after 7 h, 8 h, or 9 h. Conclusions: The addition of amaranth hydrolysates to pasta negatively impacts on the overall acceptability and, to a lesser extent, on pasta taste. However, it is possible to maintain the antihypertensive properties of the supplemented pasta under physiological conditions.