Combining heat treatment and conjugation between guarana extract and pea protein isolate to produce O/W emulsions loaded with vitamin D₃

Author(s)

da Silva-Padilha, Marluci Palazzolli ; Oliveira Junior, Fernando Divino ; Francisco, Cristhian Rafael Lopes ; da Cunha, Rosiane Lopes

• Document type: Journal article
• Source: Food Research International; v. 197, p. 14-pg., 2024-10-03.

Abstract

Growing interest in plant-based materials for stabilizing food emulsions is driven by the clean-label trend. Conjugating plant proteins with phenolic compounds from plant extracts enhances their techno-functionality and allows their use as stabilizers of emulsion-based systems. This study aimed to (i) combine heat treatment (HT) and conjugation with guarana extract (GE) to improve the emulsifying ability of pea protein isolate (PPI); (ii) encapsulate vitamin D-3 (VD) in PPI/GE-stabilized emulsions; (iii) evaluate the potential of these formulations in improving VD retention during storage and in vitro bioaccessibility. The particles showed a size distribution ranging from 0.5 to 10 mu m, depending on the processing sequence. Furthermore, HT on PPI dispersions followed by conjugation with GE led to microgels that stabilized emulsions during 30 days of storage at 25 degrees C. Also, the conjugates significantly improved VD retention, ranging from 74 to 100 %, after 30 days of storage at 25 degrees C, even in the presence of UV light. VD-loaded emulsions produced by PPI-GE conjugates showed higher bioaccessibility values (>65 %) compared to emulsions produced by PPI alone (similar to 58 %) and VD-incorporated sunflower oil (37 %). Given the above, the technological modification of PPI through conjugation with GE phenolic compounds and HT efficiently produced O/W emulsions loaded with VD, improving its bioaccessibility and tailoring a system with potential application in plant-based beverage and dessert formulations. (AU)

• FAPESP's process: 20/13217-1 - Protein-polyphenol complexes stabilizing emulsions produced in microchannels
• Grantee: Cristhian Rafael Lopes Francisco
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 22/10347-7 - Biorefinery of Amazonian fruit: an approach to intensify the recovery of essential oils, bioactive molecules and high-value products to amplify the economic and social impact for producers in Pará
• Grantee: Rosiane Lopes da Cunha
• Support Opportunities: Regular Research Grants
• FAPESP's process: 19/27354-3 - Architecture of colloidal delivery systems: what is the role of structure on the digestibility?
• Grantee: Rosiane Lopes da Cunha
• Support Opportunities: Research Projects - Thematic Grants