Many health-promoting bioactive ingredients in foods are hydrophobic and insoluble in aqueous media, and thus their utilization in commercial products are limited. A simple process to prepare aqueous dispersions of the hydrophobic bioactive ingredients with enhanced homogeneity and storage stability was developed by using starch.  Simple blending of the ingredients in an aqueous starch solution with minor heating allowed the interaction between starch chains and the hydrophobic ingredients often forming nanoparticles which are stabilized remaining homogeneous during ambient storage. Some of the agglomerated particles in the dispersion could be removed by a centrifugation or filtration.  Additional physical treatments such as ultrasonication may reduce the size of dispersed particles, and thus further improved the storage stability.  Preparation of aqueous dispersions of several biofunctional ingredients suc as coenzyme Q10, beta-carotene and alpha-tocopherol, and the characteristics of their aqueous nano-dispersions with starch will be presented.

Preparation and stabilization of aqueous nano-dispersions of hydrophobic bioactive ingredients using starch

248th National Meeting (2014)

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