Abstract
In this study, three nanostructured lipid carriers (NLC) formulations comprised of varying ratios of lipid (Compritol® 888 ATO) and oil (Labrafac® CC) including 4:1, 3:2, and 2.5:2.5, were developed by high shear homogenization technique. The effect of different ratios on the physicochemical properties and release profiles of the formulations were investigated. Increasing the amount of liquid oil increased the particle size and zeta potential whereas decreased size distribution of the blank and curcumin loaded NLC. However, the entrapment efficacy and loading capacity of the NLC for curcumin were not increased following such ratios. The different ratios were not influence on the sequence of sustained release of curcumin from the NLC over 60 h. Moreover, the amorphous curcumin and crystalline behavior of the optimized NLC were characterized by DSC and XRD techniques. Thus, the effect of the proportions of solid lipid and liquid oil in the formulations should be considered for development of suitable NLC system for oral curcumin delivery.
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