| Fat oxidation and its relation to serum parathyroid hormone in young women enrolled in a 1-y dairy calcium intervention. | |
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MedLine Citation:
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PMID: 16332655 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Increased dietary calcium is associated with changes in body composition. One proposed mechanism is that dietary calcium increases fat oxidation, potentially via regulation of serum parathyroid hormone (PTH) concentrations. OBJECTIVES: The objectives of the study were to determine whether acute or chronic increased dairy calcium intakes alter postprandial whole-body fat oxidation and whether the increased intake is related to changes in PTH concentrations. DESIGN: Normal-weight women aged 18-30 y were randomly assigned to a low (<800 mg/d, control; n = 10) or high (1000-1400 mg/d; n = 9) dietary calcium intake group for 1 y. Whole-body fat oxidation was assessed by measuring respiratory gas exchange after each subject consumed 2 isocaloric liquid meals containing 100 or 500 mg Ca at baseline and 1 y. Fasting serum PTH was measured at baseline and 1 y. RESULTS: The mean 1-y change in fat oxidation was higher in the high-calcium group than in the low-calcium control group after a low-calcium meal (0.10 +/- 0.05 compared with 0.005 +/- 0.04 g/min; P < 0.001) and a high-calcium meal (0.06 +/- 0.05 compared with 0.03 +/- 0.04 g/min; P < 0.05). The 1-y change in serum log PTH was negatively associated with the 1-y change in postprandial fat oxidation after a high-calcium meal (partial r = -0.46, P < 0.04) when controlled for the1-y change in total body fat mass. CONCLUSIONS: The results suggest that a chronic diet high in dairy calcium increases whole-body fat oxidation from a meal, and increases in fasting serum PTH relate to decreases in postprandial whole-body fat oxidation. |
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Authors:
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Carolyn W Gunther; Roseann M Lyle; Pamela A Legowski; Julie M James; Linda D McCabe; George P McCabe; Munro Peacock; Dorothy Teegarden |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The American journal of clinical nutrition Volume: 82 ISSN: 0002-9165 ISO Abbreviation: Am. J. Clin. Nutr. Publication Date: 2005 Dec |
Date Detail:
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Created Date: 2005-12-07 Completed Date: 2006-01-05 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0376027 Medline TA: Am J Clin Nutr Country: United States |
Other Details:
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Languages: eng Pagination: 1228-34 Citation Subset: AIM; IM |
Affiliation:
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Department of Foods & Nutrition, Purdue University, West Lafayette, IN 47907-1264, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adipose Tissue
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metabolism* Adolescent Adult Basal Metabolism / drug effects, physiology Body Composition / drug effects, physiology Calcium, Dietary / administration & dosage*, metabolism Calorimetry, Indirect Dairy Products* Dose-Response Relationship, Drug Female Humans Longitudinal Studies Oxidation-Reduction Oxygen Consumption / drug effects, physiology Parathyroid Hormone / blood* Postprandial Period |
| Chemical | |
Reg. No./Substance:
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0/Calcium, Dietary; 0/Parathyroid Hormone |
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