Apr 1, 1995 路 Design: 1) A case study of patients hospitalized with vitamin D toxicity after accidentally ingesting a veterinary vitamin D concentrate and 2) an in vitro experiment in which vitamin D metabolites in various concentrations were added to normal serum and their effect was noted on percentage of free 1,25-(OH)2D.

Jan 2, 2023 路 25-hydroxy vitamin D (25-OH D), or calcidiol 1,25-dihydroxy vitamin D, or calcitriol The most common test for vitamin D deficiency is the 25-hydroxy vitamin D test.

Dec 26, 2013 路 Serum levels of 25-hydroxyvitamin D (25(OH)D) are used to establish an individual's vitamin D status, while the biologically active molecule, 1,25-dihydroxyvitamin D (1,25(OH) 2 D), is produced by the hydroxylation of 25(OH)D primarily in the kidneys under the regulation of parathyroid hormone (PTH) and serum calcium .
The interplay between vitamin D and parathyroid hormone (PTH) represents one of the most important metabolic mechanisms of regulation of the calcium/phosphorus homeostasis. Secondary hyperparathyroidism is therefore a major complication that arises as a result of reduced vitamin D levels, both as primary 25-hydroxy-vitamin D (25 [OH]D) and/or 1 Sep 21, 2021 路 Mean 25(OH)D values were statistically significant higher after a loading regimen compared to a monthly administration of 24,000 IU vitamin D (76.4 卤 15.8 vs 61.4 卤 10.8 nmol/l; p < 0.01). May 1, 2010 路 The method was linear from 5 to at least 550 nmol/L with intra- and interday CV's < or = 6% for both 25-OH vitamin D3 and 25-OH vitamin D2. Recoveries ranged between 94.9 and 106.9% for 25-OH vitamin D3 and 82.7 and 100.3% for 25-OH vitamin D2. Our results for the DEQAS serum pools averaged -7.2% from the overall LC-MS method mean. . 461 282 103 61 318 175 65 479

25 oh vitamin d vs 1 25 oh vitamin d