Comparative study for optimization of folic acid nanoparticles

The present comparative study aims at studying the effect of several adjuvents on enhancing the stability and sustainability of FA NLCs which previously showed very promising results. The problem was encountered in the high drug release, high skin permeation, low deposition and low stability. In the present study, propylene glycol was added to all preparations as a stabilizer and coemulsifier. Plurol® stearique was utilized as solid lipid and stabilizer instead of apifil®. Soft paraffin was used as a softening additional lipid to Plurol® stearique to ensure the amorphous structure of NLCs. Liquid paraffin was used for its emollient effect instead of capryol TM 90 with Apifil®. The in vitro drug release, ex vivo drug permeation and skin deposition were analyzed. Selection of the most optimum formulation is achieved to investigate its photostability, long term stability. Also, it was photographed under TEM. The selected formulation was stable after six hours of irradiation. The optimized selected formulation was successfully stable in refrigerator temperature throughout 9 months of the study. The TEM photograph reveals the formation of rounded nano vesicles. The present study was successful in development of more stable, more sustained means for topical delivery of FA for future cosmoceutical benefits.