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The present study compares the emulsifying properties of sugar beet pectin (SBP), soybean soluble polysaccharide (SSPS), and gum arabic (GA) in oil-in-water (O/W) emulsions. Emulsifying properties of each hydrocolloid were evaluated in terms of the emulsion droplet-size distribution, adsorption behavior at the oil–water interface, and the zeta potential. The standard emulsion contained 15 w/w% medium-chain triglyceride as the oil source and was processed with two passes through a high-pressure homogenizer at 50 MPa. The surface-volume mean diameter d3,2 of the emulsions (pH 3.0) was equilibrated at <1.0 μm when the concentration of each hydrocolloid was equal to or higher than 1.5%, 4.0%, and 10.0% for SBP, SSPS, and GA, respectively, where the apparent shear viscosities of the emulsions at 10 s−1 were almost equivalent (30–35 mPa s). At these critical concentrations, the interfacial concentration of each hydrocolloid was in the order: SBP
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