title: A high-fat vs. a moderate-fat meal in obese boys: nutrient balance, appetite, and gastrointestinal hormone changes.
abstract: Meal composition is a contributing factor to fat gain. In this study, we investigated the relationship between postprandial nutrient balance, satiety, and hormone changes induced by a high-fat meal vs. a moderate-fat meal. Ten prepubertal obese boys (BMI z-score range: 1.3-3.0) were recruited. Two meals (energy: 590 kcal) were compared: (i) high-fat (HF) meal: 12% protein, 52% fat, 36% carbohydrates; (ii) moderate-fat (MF) meal: 12% protein, 27% fat, 61% carbohydrates. Pre- and postprandial (5 h) substrate oxidation (indirect calorimetry), appetite (visual analogue scale), biochemical parameters and gastrointestinal hormone concentrations were measured. Carbohydrate balance was significantly (P < 0.001) lower (31.3 (5.7) g/5 h vs. 66.9 (5.9) g/5 h) and fat balance was significantly (P < 0.001) higher (11.5 (3.3) g/5 h vs. -0.7 (2.9) g/5 h) after HF than MF meal. Appetite (area under the curve (AUC)) was significantly reduced after an MF than an HF meal (494 (55) cm.300 min vs. 595 (57) cm.300 min, P < 0.05). Postprandial triglyceride concentration (AUC) was significantly (P < 0.05) higher after an HF than an MF meal: 141.1 (30.3) mmol.300 min/l vs. 79.3 (23.8) mmol.300 min/l, respectively. Peptide YY (PYY), cholecystokinin (CCK), and ghrelin concentrations (AUC) were not significantly different after an HF and MF meal. Glucagon-like peptide-1 (GLP-1) was significantly (P < 0.05) higher after an HF than after an MF meal (72.3 (9.8) ng/ml vs. 22.7 (7.6) ng/ml, respectively), but it did not affect subjective appetite. In conclusion, an MF meal induced a better postprandial metabolic nutrient balance, triglyceride levels, and appetite suppression than an HF meal. Gastrointestinal hormones were not related to clinically assessed hunger suppression after both meals.
authors.affiliation: Regional Center for Juvenile Diabetes, Department of Mother and Child, Biology-Genetics, Section of Pediatrics, University of Verona, Verona, Italy. claudio.maffeis@univr.it
authors.forename: Claudio
authors.initials: C
authors.lastname: Maffeis
authors.forename: Maria G
authors.initials: MG
authors.lastname: Surano
authors.forename: Sira
authors.initials: S
authors.lastname: Cordioli
authors.forename: Sandra
authors.initials: S
authors.lastname: Gasperotti
authors.forename: Massimiliano
authors.initials: M
authors.lastname: Corradi
authors.forename: Leonardo
authors.initials: L
authors.lastname: Pinelli
mesh_terms: D001066:Appetite / Q000187:drug effects*; D019540:Area Under Curve; D002648:Child; D003430:Cross-Sectional Studies; D004040:Dietary Carbohydrates / Q000378:metabolism*; D004041:Dietary Fats / Q000008:administration & dosage / Q000378:metabolism / Q000494:pharmacology*; D004734:Energy Metabolism / Q000187:drug effects*; D052216:Glucagon-Like Peptide 1 / Q000097:blood*; D006801:Humans; D008297:Male; D009753:Nutritive Value; D009765:Obesity / Q000378:metabolism* / Q000503:physiopathology; D019518:Postprandial Period / Q000502:physiology; D014280:Triglycerides / Q000097:blood*
chemical_list: D004040:Dietary Carbohydrates; D004041:Dietary Fats; D014280:Triglycerides; D052216:Glucagon-Like Peptide 1