Estimating True Fractional Calcium Absorption
Authors: ROBERT P. HEANEY
Journal: Annals of Internal Medicine (1988)

Letters and Corrections1 June 1988Estimating True Fractional Calcium AbsorptionROBERT P. HEANEY, M.D., ROBERT R. RECKER, M.D.ROBERT P. HEANEY, M.D.Search for more papers by this author, ROBERT R. RECKER, M.D.Search for more papers by this authorAuthor, Article, and Disclosure Informationhttps://doi.org/10.7326/0003-4819-108-6-905_2 SectionsAboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinkedInRedditEmail ExcerptTo the editor: In October 1985, we described (1) a method for estimating true fractional calcium absorption, which requiredonly a single blood sample taken 5 hours after ingestion of an isotopically labeled oral test load. The algorithm was based empirically on our studies in normal perimenopausal women, in whom true fractional absorption had been measured simultaneously using the rigorous, double-isotope method (2). The coefficient of determination for fractional absorption estimated with this equation, relative to the value obtained with the double isotope method in the same women, was 0.908.Our algorithm was expressed in this equation (1): fx abs =...References1. HEANEYRECKER RR. Estimation of true calcium absorption. Ann Intern Med. 1985;103:516-21. LinkGoogle Scholar2. DEGRAZIAIVANOVICHFELLOWSRICH JPHC. A double isotope method for measurement of intestinal absorption of calcium in man. J Lab Clin Med. 1965;66:822-9. MedlineGoogle Scholar This content is PDF only. To continue reading please click on the PDF icon. Author, Article, and Disclosure InformationAuthors: ROBERT P. HEANEY, M.D.; ROBERT R. RECKER, M.D.Affiliations: Creighton University Omaha, NB 68178 PreviousarticleNextarticle Advertisement FiguresReferencesRelatedDetails Metrics Cited byQuantitative Clinical Nutrition Approaches to the Study of Calcium and Bone MetabolismImpact of Calcium Intake and Intestinal Calcium Absorption on Kidney Stones in Older Women: The Study of Osteoporotic FracturesMalic enzyme gene polymorphism is associated with responsiveness in circulating parathyroid hormone after long-term calcium supplementationSimple isotopic method using oral stable or radioactive tracers for estimating fractional calcium absorption in adult womenValidation of a simple isotope method for estimating true calcium fractional absorption in adolescentsAntiresorptive Effects of Phytoestrogen Supplements Compared with Estradiol or Risedronate in Postmenopausal Women Using 41Ca MethodologyCalcium Absorption from Commonly Consumed Vegetables in Healthy Thai WomenCalcium Fortificants: Overview and Strategies for Improving Calcium Nutriture of the U.S. PopulationThe effects of Vitamin D metabolites on expression of genes for calcium transporters in human duodenumSoy Isoflavones Do Not Affect Bone Resorption in Postmenopausal Women: A Dose-Response Study Using a Novel Approach with 41CaMeasuring calcium absorption and utilization in humansAbsorbability and utility of calcium in mineral waters1–3Calcium absorption and bone mineral density in celiacs after long term treatment with gluten-free diet and adequate calcium intakeQuantitative Clinical Nutrition Approaches to the Study of Calcium and Bone MetabolismQuantifying Human Calcium Absorption Using Pharmacokinetic MethodsEffects of Above Average Summer Sun Exposure on Serum 25-Hydroxyvitamin D and Calcium AbsorptionBioavailability of Calcium from Tofu as Compared with Milk in Premenopausal WomenCalcium Absorption from Three Salts and CaSO 4 -Fortified Bread in Premenopausal WomenFactors Influencing the Measurement of Bioavailability, Taking Calcium as a ModelFactors associated with calcium absorption efficiency in pre- and perimenopausal women,,Bioavailability of the calcium in fortified soy imitation milk, with some observations on method,,Low Fractional Calcium Absorption Increases the Risk for Hip Fracture in Women with Low Calcium IntakeKristine E. Ensrud, MD, MPH, Tu Duong, MA, Jane A. Cauley, DrPH, Robert P. Heaney, MD, Randi L. Wolf, PhD, Emily Harris, PhD, and Steven R. Cummings, MD, for the Study of Osteoporotic Fractures Research Group*Effects of Vitamin D3, 25(OH)D, and 1,25(OH)2D on Calcium Absorption EfficiencyCalcium Absorptive Effects of Vitamin D and Its Major Metabolites1Vitamin D Receptor Gene Polymorphisms, Bone Turnover, and Rates of Bone Loss in Older African-American WomenCalcium Bioavailability from High Oxalate Vegetables: Chinese Vegetables, Sweet Potatoes and RhubarbWheat Bran Abolishes the Inverse Relationship between Calcium Load Size and Absorption Fraction in WomenEffect of Psyllium on Absorption of Co-ingested CalciumAbsorbability of the calcium in a high-calcium mineral waterEffect of caseinphosphopeptide on absorbability of co-ingested calcium in normal postmenopausal womenAbsorbability of Calcium from Brassica Vegetables: Broccoli, Bok Choy, and KaleAbsorbability of Calcium From Common BeansHuman Calcium Absorption from Whole-Wheat ProductsIsotopic exchange of ingested calcium between labeled sources. Evidence that ingested calcium does not form a common absorptive poolCalcium absorption efficiency and calcium requirements in children and adolescentsSoybean phytate content: effect on calcium absorptionCalcium supplements: Practical considerationsInfluence of calcium load on absorption fractionCalcium absorptive consistencyAbsorbability of calcium sources: The limited role of solubilityCalcium absorption from kaleClinical Approaches for Studying Calcium Metabolism and Its Relationship to Disease 1 June 1988Volume 108, Issue 6Page: 905-906KeywordsAlgorithmsCalciumHematologic testsIngestion ePublished: 1 December 2008 Issue Published: 1 June 1988 PDF downloadLoading ...