The effect of viscosity and volume on pleasantness and satiating power of rice milk
2004
Russell, K. | Delahunty, C.
The present study examined the influence of two viscosity levels (62.3 and 3.2 mPa s relative) either matched for taste or nonadjusted, and two volumes (500 and 250 ml) in a rice milk beverage on satiety and pleasantness. The separate viscosity treatments were isocaloric. Seventy-one participants consumed one of the samples in a fasted state between the hours of 8:30-9:30 a.m. Participants rated thirst and hunger prior to consumption, and then thirst, hunger, overall pleasantness, pleasantness of taste, and pleasantness of viscosity immediately post-consumption. The time to consumption of lunch was measured using food diaries. This procedure was repeated for five consecutive days. Significantly greater reductions of hunger, and longer times to lunch were observed with the 500 ml treatments, but not with the thickened treatments. Results indicate that the volume of a rice milk beverage consumed in place of a breakfast has more satiating effect than the viscosity. Moreover, a change in overall pleasantness ratings, and pleasantness of taste ratings over time was found, demonstrating the importance of repeat testing for hedonic ratings of novel foods.
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