The optimum formulation for the preparation of the gac oil powder and wall material emulsion using whey protein concentrate and gum Arabic (7/3, g/g) for spray drying was a 29.5% solution and an oil load of 0.2 g/g (Kha et al., 2014b). For spray drying in a Lab Plant SD-06 A spray dryer (Lab Plant UKLtd., North Yorkshire, UK), the optimum conditions were an inlet temperature of 154◦C, outlet temperature of 80◦C, feed flow rate of 970 mL/h, air flow speed of 4.3 m/s, and pressure of 2 bar (Kha et al., 2014 c). The powder had 20% oil and 4.2%moisture content.