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The synergistic approach of using elastic liposomes (ELs) and low frequency ultrasound (LFU) was developed to enhance transepidermal delivery of hydrophilic macromolecules, hyaluronic acid (HA).HA loaded ELs were prepared with varying cholesterol contents by reverse phase evaporation technique. Their mean sizes were evaluated using dynamic light scattering. Entrapment efficacy (%EE) was determined...