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Dietary calcium intake and obesity
1Department of Family Medicine, University of Wisconsin-Madison, Madison, WI 53715, USA. sbschrag@wisc.edu
The Journal of the American Board of Family Practice
|May 10, 2005
Summary
High dietary calcium intake may help manage obesity by influencing fat metabolism and increasing fat excretion. Dairy sources appear more effective than supplements for weight management.
Area of Science:
- Nutrition Science
- Metabolic Health
- Obesity Research
Background:
- Obesity is a growing epidemic in the United States.
- Epidemiologic data link high calcium intake to lower prevalence of overweight, obesity, and insulin resistance syndrome.
- Calcium influences adipocyte (fat cell) metabolism.
Purpose of the Study:
- To explore the mechanisms by which calcium intake affects adipocyte metabolism.
- To understand the impact of calcium on lipogenesis and lipolysis.
- To evaluate the role of dietary calcium in weight management.
Main Methods:
- Review of epidemiologic data on calcium intake and obesity prevalence.
- Examination of studies in transgenic mice demonstrating calcium's influence on adipocyte metabolism.
- Analysis of hormonal changes (parathyroid hormone, 1,25-hydroxy vitamin D) associated with high calcium intake.
Main Results:
- High calcium intake depresses parathyroid hormone and 1,25-hydroxy vitamin D levels.
- Decreased intracellular calcium inhibits lipogenesis (fat creation) and stimulates lipolysis (fat breakdown).
- High dietary calcium increases fecal fat excretion and may elevate core body temperature.
Conclusions:
- Adequate calcium intake, particularly from dairy products, may be a beneficial strategy for weight management.
- Calcium influences key metabolic pathways involved in fat storage and breakdown.
- Primary care providers should incorporate calcium intake recommendations into dietary counseling for weight management.
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