Encapsulation of (─)-epigallocatechin-3-gallate (EGCG) in solid lipid nanoparticles for food applications

Rasha Shtay*, Julia K. Keppler, Katrin Schrader, Karin Schwarz

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

65 Citations (Scopus)


A nanoparticlulate delivery system was prepared for developing a food grade carrier for the major bioactive constituent in green tea; (─)-epigallocatechingallate (EGCG), in order to protect it against degradation during storage and digestion under simulated gastrointestinal pH conditions. EGCG-loaded solid lipid nanoparticles (EGCG-SLNs) were produced by the hot homogenization method. The lipid matrix used in the production consisted of pure cocoa butter. A combination of sodium stearoyl-2-lactylate (SSL) and mono- and diglycerides (MDG) was applied as a surfactant blend. The nanoparticles loaded with different concentrations of EGCG had an average particle size in the range of 108–122 nm. A maximal encapsulation efficiency of 68.5% was obtained. The produced food grade SLNs successfully protected the encapsulated EGCG along the storage period as well as under the adverse conditions at neutral pH values. The developed system offers good potential for enriching food products with EGCG.

Original languageEnglish
Pages (from-to)91-100
Number of pages10
JournalJournal of Food Engineering
Publication statusPublished - Mar 2019
Externally publishedYes


  • Crystal modification
  • Drug-enriched shell model
  • EGCG stability
  • Green tea extract
  • In-vitro release


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