Characterization, physicochemical stability, and evaluation of in vitro digestibility of solid lipid microparticles produced with palm kernel oil and tristearin

Author(s)

da Silva, Janaina Costa ; Borrin, Thais Ribeiro ; Ruy, Pamela ; Brito, Thais Carvalho ; Pinheiro, Ana Cristina ; Vicente, Antonio Augusto ; de Pinho, Samantha Cristina

• Document type: Journal article
• Source: FOOD SCIENCE AND TECHNOLOGY; v. 34, n. 3, p. 7-pg., 2014-07-01.

Abstract

Solid lipid particles have been investigated by food researchers due to their ability to enhance the incorporation and bioavailability of lipophilic bioactives in aqueous formulations. The objectives of this study were to evaluate the physicochemical stability and digestibility of lipid microparticles produced with tristearin and palm kernel oil. The motivation for conducting this study was the fact that mixing lipids can prevent the expulsion of the bioactive from the lipid core and enhance the digestibility of lipid structures. The lipid microparticles containing different palm kernel oil contents were stable after 60 days of storage according to the particle size and zeta potential data. Their calorimetric behavior indicated that they were composed of a very heterogeneous lipid matrix. Lipid microparticles were stable under various conditions of ionic strength, sugar concentration, temperature, and pH. Digestibility assays indicated no differences in the release of free fatty acids, which was approximately 30% in all analises. The in vitro digestibility tests showed that the amount of palm kernel in the particles did not affect the percentage of lipolysis, probably due to the high amount of surfactants used and/or the solid state of the microparticles. (AU)

• FAPESP's process: 10/15031-0 - Production and stability of solid lipid microparticles containing medium chain triacylglycerides
• Grantee: Thais Ribeiro Borrin
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 12/02316-2 - Dynamics in vitro digestibility of solid lipid microparticles produced with medium chain triacylglycerides
• Grantee: Janaína Costa da Silva
• Support Opportunities: Scholarships abroad - Research Internship - Master's degree
• FAPESP's process: 10/13229-8 - Microstructure, stability and in vitro digestibility of solid lipid microparticles containing medium chain triacylglycerides
• Grantee: Janaína Costa da Silva
• Support Opportunities: Scholarships in Brazil - Master