(03-11-11) Calcium, dairy products, and energy balance in overweight adolescents: a controlled trial1,2,3,4

1. Connie M Weaver,
2. Wayne W Campbell,
3. Dorothy Teegarden,
4. Bruce A Craig,
5. Berdine R Martin,
6. Rajni Singh,
7. Michelle M Braun,
8. John W Apolzan,
9. Tamara S Hannon,
10. Dale A Schoeller,
11. Linda A DiMeglio,
12. Yvonne Hickey, and
13. Munro Peacock
+ Author Affiliations
1. 1From the Departments of Foods and Nutrition (CMW, WWC, DT, BRM, RS, MMB, JWA, and YH) and Statistics (BAC), Purdue University, West Lafayette, IN; the Indiana University School of Medicine, Indianapolis, IN (TSH, LAD, and MP); and the Department of Nutrition Science, University of Wisconsin, Madison, WI (DAS).
+ Author Notes
↵2 None of the sponsors had a role in study design, data analysis, or preparation of the manuscript.
↵3 Supported by the NIH (grant DK 066108). Test products were formulated and provided by Schwann Food Co. The National Dairy Council funded the doubly labeled water measures.
↵4 Address reprint requests and correspondence to CM Weaver, Department of Foods and Nutrition, Purdue University, 700 West State Street, West Lafayette, IN. E-mail: [email protected].
Abstract
Background: Dairy product and calcium consumption have been associated with modifying body fat and body weight in children and adults.
Objective: In overweight adolescent boys and girls, we aimed to determine the effect of the doubling of habitual calcium intake to the recommended intake from dairy or calcium carbonate on energy balance and purported mechanisms including fecal fat excretion, macronutrient use, and parathyroid hormone suppression.
Design: Twenty-five girls with a mean (?SD) BMI (in kg/m2) of 33 ? 5 and 17 boys with a BMI of 28 ? 5, aged 12?15 y, participated in two 3-wk controlled feeding sessions that used a crossover design in random order as a summer research camp. In one session, 756 mg Ca/d was consumed; in the other session, an additional 650 mg Ca/d was provided as dairy or calcium carbonate supplements that were matched to the control in macronutrient content. Total energy and macronutrient intakes were controlled and were the same for the 2 sessions for each subject. Primary outcome measures were energy balance, fecal fat excretion, lipid oxidation, and postprandial energy expenditure.
Results: There were no effects of quantity or source of calcium on energy or fat balance, despite calcium-induced increases (P <0.01) in postprandial serum parathyroid hormone suppression.
Conclusion: These data lend little evidence to support the proposed mechanisms for the relation between an increase in calcium intake from calcium carbonate or dairy and weight loss or weight maintenance in children.

1. Source: Am J Clin Nutr November 2011 vol. 94 no. 5 1163-1170

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