Interaction of curcumin and bixin with β-cyclodextrin: complexation methods, stability, and applications in food

J Agric Food Chem. 2011 Apr 13;59(7):3348-57. doi: 10.1021/jf104223k. Epub 2011 Mar 7.

Abstract

This work aimed to compare methods for the formation of complexes of bixin and curcumin with β-cyclodextrin (β-CD) and to evaluate the stability of the complexes formed by these methods and their food applications. The stoichiometric relationship between curcumin and β-CD was 1:2 and that between bixin and β-CD was 1:1. Curcumin-β-CD and bixin-β-CD complexes formed by kneading, coprecipitation, and simple mixing were evaluated by differential scanning calorimetry (DSC), thermogravimetry analysis (TGA), or nuclear magnetic resonance (NMR-H). For both curcumin and bixin, the best method of complexation was coprecipitation. Complexation of colorants with β-CD promoted an intensification of color and increased water solubility; however, stabilization in the presence of light occurred only for bixin. Application of curcumin-β-CD in cheese and yogurt and bixin-β-CD in the curd did not alter the initial characteristics of the products, which were sensorialy well accepted. Therefore, the complexation of these natural colorants with β-CD favors their use in low-fat foods, broadening the field of industrial application.

MeSH terms

  • Carotenoids / chemistry*
  • Cheese
  • Chemical Precipitation
  • Curcumin / chemistry*
  • Drug Stability
  • Food Coloring Agents / chemistry*
  • Food Technology / methods*
  • Light
  • Yogurt
  • beta-Cyclodextrins / chemistry*

Substances

  • Food Coloring Agents
  • beta-Cyclodextrins
  • Carotenoids
  • bixin
  • Curcumin
  • betadex