Microencapsulation of organic coffee husk polyphenols: Effects on release, bioaccessibility, and antioxidant capacity of phenolics in a simulated gastrointestinal tract

Author(s)

Silva, Gezaildo Santos ; Gomes, Matheus Henrique Gouveia ; de Carvalho, Leila Moreira ; Abreu, Thaianaly Leite ; Lima, Marcos dos Santos ; Madruga, Marta Suely ; Kurozawa, Louise Emy ; Bezerra, Taliana Kenia Alencar

• Document type: Journal article
• Source: Food Chemistry; v. 434, p. 10-pg., 2024-02-15.

Abstract

Whey protein concentrate (WPC) and maltodextrin were used to microencapsulate polyphenols extract from organic coffee husks by spray drying. The microparticles were characterized and evaluated for their influence on the release, bioaccessibility, and antioxidant capacity of polyphenols in the simulated gastrointestinal tract. WPC as a single encapsulating agent promoted better yield (54.8%) of microparticles. The microparticles showed solubility above 92%, and lower hygroscopicity when encapsulated with maltodextrin alone (7.4%). Smaller diameter (6.78 mu m), better encapsulation efficiency (89.1%) and retention of compounds (74.4%) were observed in microparticles with WPC in the composition. Polyphenols were completely released from the microparticles during simulated gastric digestion. The microparticles influenced the bioaccessibility of over 70% of the polyphenols in the intestinal phase. The microparticles showed rapid gastrointestinal release effect but favored the increase of bioaccessibility and preservation of the antioxidant capacity of polyphenols, especially those from the microparticles with WPC compared to the free extract. (AU)

• FAPESP's process: 11/04230-5 - Design of particles for functional finishing of textiles: investigation of microencapsulation techniques
• Grantee: Ana Silvia Prata
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 16/09824-4 - Investigation for production of biodegradable carriers for natural larvicidals against Aedes aegypti
• Grantee: Ana Silvia Prata
• Support Opportunities: Regular Research Grants