British Journal of Nutrition

Vitamin D supplementation in pre- and postmenopausal women

Changes in vitamin-D metabolites and parathyroid hormone in plasma following cholecalciferol administration to pre- and postmenopausal women in the Netherlands in early spring and to postmenopausal women in Curaçao

Fiona R. M. Van Der Klisa1, Jan H. P. Jonxisa2*, Jasper J. Van Doormaala3, Peter Sikkensa4, Alejandro E. C. Saleha5 and Frits A. J. Muskieta1

a1 Central Laboratory for Clinical Chemistry, University Hospital Groningen, Oostersingel 59, PO Box 30.001, 9700 RB Groningen, The Netherlands

a2 Retired Professor of Paediatrics, Rijksstraatweg 65, 9752 AC Haren, The Netherlands

a3 Department of Internal Medicine, University Hospital Groningen, The Netherlands

a4 Hoofdweg 86, 9761 EK Eelde, The Netherlands

a5 Department of Internal Medicine, St Elisabeth Hospital, Willemstad, Curaçao, The Netherlands Antilles

Abstract

To study the effect on plasma 25-hydroxycholecalciferol (25(OH)D), 1,25-dihydroxycholecalciferol (1,25(OH)2D) and parathyroid hormone (PTH) we supplemented premenopausal (aged 30 (SD 7) years) and postmenopausal (aged 61 (SD 2) years) white women living in The Netherlands in late winter/early spring, and elderly black and white women (aged 75 (SD 6) years) living in Curacao (Dutch Antilles) with either 10 or 20µpg cholecalciferol/d for 4, 5 and 9 weeks respectively. Baseline plasma 25(OH)D concentration of Dutch women was lower than that of Curacao women. Postmenopausal Dutch women had a higher PTH concentration in plasma than premenopausal Dutch and postmenopausal Curaçao women. There were no differences in plasma 1,25(OH)2D. Cholecalciferol administration increased 25(OH)D in all groups, 1,25(OH)2D in postmenopausal Curaçao women and PTH in postmenopausal Curaçao women and premenopausal Dutch women. Serum and urinary Ca and phosphate concentrations did not change. There were no response differences between 10 and 20 µg doses. Oral cholecalciferol administration (either 10 or 20 µg/d) to women living at northern latitudes in late winter/early spring increased 25(OH)D levels to the baseline levels of elderly people living in the tropics.

(Received March 06 1995)

(Revised July 05 1995)

(Accepted August 08 1995)

Footnotes

* Professor Jonxis died on 26 July 1995.

† For reprints.

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