Poster Topical Area: Energy and Macronutrient Metabolism
Location: Hall D
Poster Board Number: 509
Objective: The purpose of this study was to determine the acute effects of a high-protein, high-fiber (HP/HFb) beverage taken as a preload compared to an isocaloric lower-protein, lower-fiber (LP/LFb) placebo beverage on subjective appetite ratings and subsequent energy intake at an ad libitum meal in healthy adults.
Methods: A total of 50 overweight/obese men and women (N=25 men, 25 women; age 30±2 years; BMI 29.6±0.3 kg/m2) received a 160 calorie HP/HFb beverage containing 17g protein and 6g fiber on one occasion and an isocaloric LP/LFb placebo beverage containing 1g protein and 3g fiber on another occasion in a randomized, double-blind, crossover design. Thirty minutes following consumption of the beverage preload, an ad libitum pizza meal was provided to be consumed over a 30-min period. Visual analog scales (VAS) were used to assess subjective appetite ratings throughout the testing period. The revised restraint scale (RSS) was used to classify participants as restrained or unrestrained eaters.
Results: HP/HFb led to greater reductions in postprandial desire to eat and hunger compared to LP/LFb (both, p<0.05) but did not significantly affect postprandial fullness or prospective food consumption. Subsequent meal energy intake tended to be lower after HP/HFb compared to LP/LFb (p=0.09). A sub-analysis showed lower energy intake after HP/HFb in older participants (≥ 25 y) compared to LP/Lfb, which was not observed in the younger participants (<25 years).
Conclusions: Compared to LP/LFb, a HP/HFb beverage preload reduced hunger, desire to eat, and tended to reduce subsequent food intake. Dietary restraint and age appear to influence subsequent energy intake and should be taken into account when designing nutrition interventions for weight reduction and/or maintenance.
This trial was registered on Clinicaltrials.gov: Identifier NCT02979717.
Funding Source: This study was funded by Beachbody, LLC.
El Segundo, California