Proteins in Food Systems
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Abstract
Abstract
Germinated Andean lupin whole flour (GAL) is rich in protein, dietary fiber, essential amino acids, and bioactive compounds, representing a promising alternative for the development of sustainable plant-based foods. This study investigated the feasibility of partially replacing soy protein isolate (SPI) with GAL in high-moisture extruded meat analogues. A central composite design was applied to evaluate the effects of the GAL ratio (0:100–50:50) and feed moisture content (50–70%) on the technological properties of the extrudates. The Response Surface Methodology was used to model and optimize the process. The incorporation of GAL significantly affected the (p 0.75). Increasing GAL levels increased the WSI from 6.21 to 18.79% and cooking loss from 1.01 to 3.84%, while reducing OAC from 239.42 to 166.57%, indicating substantial modifications in matrix organization and hydration behavior. Numerical optimization identified an optimal formulation containing 12% GAL, 88% SPI, and 65.5% feed moisture, with a desirability of 77.82%. Model validation showed relative deviations lower than 10% between predicted and experimental values. The optimized meat analogue exhibited high protein content (84.44%), favorable techno-functional properties, and improved nutritional quality, with higher levels of branched-chain amino acids (17.34 g·100 g−1 protein), essential amino acids (33.32 g·100 g−1 protein), and in vitro protein digestibility (90.1%) compared with the control formulation. Multivariate analyses confirmed that phenylalanine, histidine, methionine, and leucine were the main variables that discriminated between the protein sources and the extruded products. Overall, GAL demonstrated strong potential as a sustainable functional ingredient to produce nutritionally enhanced high-moisture meat analogues.
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@article{PaucarMenacho2026Germinated,
title = {Germinated Andean Lupin Whole Flour as a Partial Soy Protein Isolate Substitute for the Development of High-Moisture Extruded Meat Analogues: Chemometric Evaluation of Technological Properties and Nutritional and Functional Characterization},
author = {Luz María Paucar‐Menacho and Anggie Verona-Ruiz and Alicia Lavado-Cruz and Williams Esteward Castillo Martínez and Wilson Daniel Símpalo-López and Grimaldo Quispe and John Kelby Gonzales Capcha and Wenceslao T. Medina and Nathália de Andrade Neves and Márcio Schmiele},
journal = {Foods},
year = {2026},
doi = {10.3390/foods15152633},
url = {https://doi.org/10.3390/foods15152633}
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