Affiliation:
1. Creighton University, Omaha, Nebraska 68131
Abstract
Abstract
Background: Calcium absorption efficiency is a more important determinant of calcium balance than calcium intake itself. The sources of variability in absorptive performance are only partly elucidated.
Purpose: The aim of the study was to explore the relationship between body size and calcium absorption efficiency.
Design and Setting: Metabolic studies were performed on an inpatient metabolic unit in an academic health sciences center.
Subjects: One hundred seventy-eight women, with an average age of 50.2 yr, were studied from one to five times and yielded an aggregate data set containing 633 individual studies.
Methods: Calcium absorption fraction was measured by the dual-tracer method. Observed values were expressed as residuals from predicted values for each woman’s actual calcium intake, using the previously published relationship between intake and absorption.
Results: Absorption residuals were significantly positively correlated with height, weight, and surface area, and after adjusting for estrogen status, these body size variables accounted for approximately 4% of the total variability.
Conclusion: The magnitude of the effect is such that a woman 1.8 m in height would absorb 30+% more calcium from a given intake than a woman 1.4 m tall.
Subject
Biochemistry, medical,Clinical Biochemistry,Endocrinology,Biochemistry,Endocrinology, Diabetes and Metabolism
Reference11 articles.
1. Osteoporosis;Heaney;In: Coulston AM, Rock CL, Monsen ER, eds. Nutrition in the prevention and treatment of disease. San Diego: Academic Press;,2001
2. Calcium absorption in women: relationships to calcium intake, estrogen status, and age.;Heaney;J Bone Miner Res,1989
3. An investigation of sources of variation in calcium absorption efficiency.;Barger-Lux;J Clin Endocrinol Metab,1995
4. A relationship between body composition and calcium absorption efficiency;Barger-Lux;J Bone Miner Res.,2004
5. Calcium balance and calcium requirements in middle-aged women.;Heaney;Am J Clin Nutr,1977
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