Change in interfacial tension (mN/m) with time for the sunflower oils (SOs) with increasing concentrations of phytosterols (A1), in presence of bile salts andelectrolytes (B) and during lipolysis (C). Typical drop images of sunflower oil containing different phytosterols concentrations (A2). Note the presence of crystallisedphytosterols in images A2 and B (red arrow). PS: phytosterols; SOs, Florisil®-treated sunflower oil. (For interpretation of the references to colour in this figure legend,the reader is referred to the web version of this article.)