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  • Title: Breakfasts Higher in Protein Increase Postprandial Energy Expenditure, Increase Fat Oxidation, and Reduce Hunger in Overweight Children from 8 to 12 Years of Age.
    Author: Baum JI, Gray M, Binns A.
    Journal: J Nutr; 2015 Oct; 145(10):2229-35. PubMed ID: 26269241.
    Abstract:
    BACKGROUND: Currently 1 in every 3 children aged 2-19 y is overweight or obese. Breakfast is a key component of a healthy diet and has the potential to affect children's health. OBJECTIVE: The objective of this study was to determine whether consumption of a protein-based breakfast (PRO) increases postprandial energy metabolism and substrate oxidation, reduces hunger, and reduces food intake at lunch compared with a carbohydrate-based breakfast (CHO) in normal weight (NW) vs. overweight/obese (OW) children. METHODS: A randomized, crossover-design study was conducted in NW (n = 16; 33 ± 1 kg) and OW (n = 13; 46 ± 2 kg) children (10 ± 1 y). Participants were served either a PRO [344 kcal, 21% protein (18 g), 52% carbohydrate, and 27% fat] or CHO [327 kcal, 4% protein (3 g), 67% carbohydrate, and 29% fat]. Energy expenditure (EE), substrate oxidation, appetite, and blood glucose were measured over a 4 h period. Four hour postprandial participants were provided with access to a lunch buffet and food intake was recorded. RESULTS: After breakfast, OW children in the PRO group had higher (P < 0.0001) EEs and fat oxidation over the 4 h period than did the NW children in the CHO and PRO groups. There was no difference in postprandial EE or carbohydrate oxidation between the CHO and PRO groups over the 4 h period; however, fat oxidation was 16% higher (P < 0.05) after the PRO than the CHO and postprandial carbohydrate oxidation at 4 h was 32% higher after the PRO than the CHO (P < 0.01), independent of weight group. All participants had decreased feelings of hunger (-14%; P < 0.01) and increased fullness (+32%; P < 0.05) after the PRO than the CHO. Finally, there was no difference in food intake within the NW and OW groups. CONCLUSION: This study indicates that breakfast macronutrient composition affects postprandial responses in both NW and OW children. A PRO increases postprandial EE and fat oxidation, reduces hunger, and increases satiety when compared with a carbohydrate-based breakfast.
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