comparison of short-term appetite and energy intakes in normal weight and obese boys following glucose and whey-protein drinks

Objective: To compare the effect of glucose and whey-protein preloads on satiety and food intake (FI) as affected by time to the next meal and body composition in normal weight (NW) and obese (OB) boys. Design: Cross-sectional clinical intervention study of the effect of caloric preloads on FI contr...

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Published in:	International Journal of Obesity Vol. 32; no. 2; pp. 362 - 371
Main Authors:	Bellissimo, N, Desantadina, M.V, Pencharz, P.B, Berall, G.B, Thomas, S.G, Anderson, G.H
Format:	Journal Article
Language:	English
Published:	London Nature Publishing Group UK 01-02-2008 Nature Publishing Nature Publishing Group
Subjects:	Adolescent appetite Appetite Regulation - physiology beverages Biological and medical sciences Blood Glucose - metabolism Body composition Body Composition - physiology body mass index Body weight boys Child Cross-Sectional Studies dietary protein Drinking - physiology Eating - physiology energy intake Energy Intake - physiology Epidemiology Evaluation Glucose Glucose metabolism Health Promotion and Disease Prevention Humans ideal body weight Internal Medicine Male Management Medical sciences Medicine Medicine & Public Health Metabolic Diseases Milk Proteins - metabolism Nutritional aspects nutritional intervention Obesity Obesity - metabolism Obesity - physiopathology original-article Physiological aspects Public Health Risk factors Satiation - physiology satiety Time Factors Whey products Whey Proteins Canada body composition macronutrients children food intake Human Appetite Short term Obesity Nutrition Body weight Nutrition disorder Metabolic diseases Male Corporal biometry Glucose Normal Body composition Feeding Diet Food intake Beverage Whey protein Child Macronutrient Nutritional status Comparative study
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Summary:	Objective: To compare the effect of glucose and whey-protein preloads on satiety and food intake (FI) as affected by time to the next meal and body composition in normal weight (NW) and obese (OB) boys. Design: Cross-sectional clinical intervention study of the effect of caloric preloads on FI control in boys. Subjects: Seventeen NW (body mass index (BMI)=18.9±0.5 kg/m 2 ; age=12.2±0.3 years) and 17 OB boys (BMI=25.8±0.9 kg/m 2 ; age=11.4±0.3 years) (Experiment 1) and 12 NW boys (BMI=18.6±0.6 kg/m 2 ; age=12.1±0.3 years) (Experiment 2). Measurements: On three separate mornings and in random order each of the boys consumed a noncaloric sweetened preload, glucose (837 kJ) or whey protein (837 kJ) (Experiment 1) or noncaloric preload, glucose (1.0 g/kg) or whey protein (1.0 g/kg) (Experiment 2) made up to 250 ml with water 2 h after the consumption of a fixed breakfast. Food intake from a pizza meal was measured 30 min (Experiment 1) or 60 min (Experiment 2) later. Results: In Experiment 1, glucose suppressed FI (mean kJ±s.e.m.) in NW (3126±304) and OB boys (3116±286) compared with the control (NW, 4015±337 and OB, 3791±255). Whey protein suppressed FI in NW, but not in OB boys. Body weight, fat-mass and fat-free mass were positively associated with FI after all treatments in NW, but was not related to FI in OB boys. In Experiment 2, FI was suppressed by whey protein (2683±367) more than by glucose (3107±294) or the control (3585±361). Conclusion: NW and OB boys respond differently to whey-protein preloads, with time to next meal a factor in the response to both glucose and protein preloads.
Bibliography:	http://www.nature.com/ijo/ ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0307-0565 1476-5497
DOI:	10.1038/sj.ijo.0803709