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The current study was focussed on the fabrication of nanostructered lipid carrier (NLC) of tretinoin
(TRE) followed by its incorporation into hyaluronic acid (HA)-loaded carbapol 940 gel aiming to improve acne
treatment. Materials and Methods: The TRE-NLC was fabricated using melt-emulsification and ultrasonication
method. The fabricated NLC was studied for its particle size, zeta potential, polydispersity index, morphology,
and entrapment efficiency of TRE. The gel containing HA and TRE-NLC were evaluated for pH, spreadability,
extrudability, bloom strength, and viscosity. The in vitro release studies and in vitro occlusivity test for the
formulated gel and marketed gel were carried out. Results and Discussion: The formulated gel showed better
release of 86.32% when compared to marketed gel with 38.52% release in 8 h. Occlusion factor can be related
to skin hydration based upon the ability to prevent water loss from the surface of the skin which was found to
be 42.29% for the formulated gel and 4.76% for the marketed gel. Conclusion: The combination of TRE-loaded
NLCs and HA gel may provide a more effective treatment for acne by diminishing the dryness than either TRE
or HA gel alone.
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