Human and bovine milk were analyzed for vitamin D, 25-hydroxyvitamin D, 24, 25-
dihydroxyvitamin D, 25, 26-dihydroxyvitamin D and 1, 25-dihydroxyvitamin D using …

Serum levels of 1, 25-dihydroxyvitamin D, 24, 25-dihydroxyvitamin D, and 25-hydroxyvitamin
D in nondialyzed patients with chronic renal failure. Background In patients with chronic …

The importance of fat-soluble vitamins in fundamental biochemistry, nutrition and medicine
is generally recognized. Assays for these compounds in biological materials traditionally …

Recent studies suggest that hypercalcemia of sarcoidosis is due to high blood
concentrations of calcitriol and that this compound may be synthesized at an extra-renal site …

The comparison of equilibrium and disequilibrium assay conditions for ergocalciferol,
cholecalciferol and their major metabolites were investigated to evaluate:(1) optimization of …

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Extra-renal production of calcitriol in chronic renal failure. Renal 1-alpha-hydroxylase activity
is tightly regulated in normal humans and intact animals. No significant changes in serum l …

Recent studies provide evidence for extrarenal production of 1 alpha, 25-dihydroxyvitamin D
[1 alpha, 25 (OH) 2D]. To investigate this possibility, serum vitamin D, 25-hydroxyvitamin D …

Biologically active vitamin D (1, 25-dihydroxycholecalciferol or 1, 25 (OH) 2D) is synthetized
from inactive prohormone 25-hydroxycholecalciferol (25 (OH) D) by the enzyme CYP27B1 1 …

Parenteral aluminum administration in the dog: II. Induction of osteomalacia and effect on
vitamin D metabolism. There is an association between bone aluminum (Al) accumulation …