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Journal of Clinical Endocrinology & Metabolism, Vol 45, 199-208, Copyright © 1977 by Endocrine Society

ARTICLES

Vitamin D metabolism and the response to 1,25-dihydroxycholecalciferol in Osteoporosis

M Davies, EB Mawer and PH Adams

The metabolism of isotopically-labelled cholecalciferol and the response to small doses of 1,25-dihydroxycholecalciferol (1,25-(OH)2D3) was studied in a group of women with osteoporosis presenting with crush vertebral fracture. No abnormality of vitamin D metabolism was detected. The administration of 1 microgram 1,25-(OH)2D3 for between 8 and 20 days was associated with an increased intestinal absorption and urinary excretion of calcium but caused no improvement in calcium balance. There was a small but significant rise in serum calcium and phosphorus and significant reduction in immunoassayable parathyroid hormone levels during treatment. It is concluded that 1,25-(OH)2D3 is unlikely to be of value in the management of osteoporosis.




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Copyright © 1977 by The Endocrine Society