Background: Cationic liposomes can enhance the permeability of drugs in 3-D skin. Chitosan is considered a safe material for percutaneous delivery; thus, this study uses chitosan-incorporated cationic liposomes.
Aims: This study investigated the improvement in skin brightness, melanin, and melasma after treatment niacinamide-incorporated chitosan cationic liposomes.
Methods: A skin brightening agent, niacinamide, was formulated into cationic liposomes to facilitate percutaneous absorption and was clinically tested in 21 Korean female subjects. Cationic liposomes were prepared using a high-pressure homogenizer after mixing an oil phase containing lecithin and cholesterol and an aqueous phase containing niacinamide and chitosan.
Results: The cationic liposomes exhibited stability over 28 days, with a particle size of 255-275 nm and zeta potential of 10-14 mV. Cationic liposomes containing niacinamide and a control formulation were applied to the left and right side of the face, respectively, twice daily for 28 days. Skin brightness, melanin index, and area of melasma were significantly enhanced where cationic liposomes were used, in comparison with formulations without cationic liposomes, demonstrating a 1.38-2.08-fold improvement.
Conclusion: Thus, we established that chitosan liposomes augmented the percutaneous absorption of niacinamide and improved the appearance of the skin.
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