Stability and bioaccessibility of β-carotene in nanoemulsions stabilized by modified starches

Rong Liang, Charles F. Shoemaker, Xiaoqing Yang, Fang Zhong, Qingrong Huang

Research output: Contribution to journalArticlepeer-review

191 Scopus citations


Oil-in-water nanoemulsions stabilized by food-grade biopolymer emulsifiers (modified starches) were fabricated using high-pressure homogenization in an effort to improve the stability and bioaccessibility of β-carotene. Physicochemical and biological properties of β-carotene nanoemulsions were investigated considering the particle size, β-carotene retention, and in vitro digestion. During 30 days of storage at different conditions, the mean diameters of the emulsion systems were increased by 30-85%. The retention of β-carotene in nanoemulsions was significantly higher compared to that of the β-carotene dispersed in bulk oil. After in vitro digestion, the bioaccessibility of β-carotene was increased from 3.1% to 35.6% through nanoencapsulation. The results also indicated that modified starch with high dispersed molecular density led to a higher retention but lower bioaccessibility of β-carotene in nanoemulsions. This could be due to the thick and dense interfacial layer around the oil droplets. This result provides useful information for developing protection and delivery systems for carotenoids.

Original languageEnglish (US)
Pages (from-to)1249-1257
Number of pages9
JournalJournal of agricultural and food chemistry
Issue number6
StatePublished - Feb 13 2013

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Agricultural and Biological Sciences(all)


  • bioaccessibility
  • modified starch
  • nanoemulsion
  • stability
  • β-carotene


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