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Mapping of several bone diseases onto levels of vitamin D (calcidiol) in the blood [6] Normal bone vs. osteoporosis. Vitamin D deficiency is typically diagnosed by measuring the concentration of the 25-hydroxyvitamin D in the blood, which is the most accurate measure of stores of vitamin D in the body.
The kidney influences the plasma ionized calcium concentration in yet another manner. It processes vitamin D 3 into calcitriol, the active form that is most effective in promoting the intestinal absorption of calcium. This conversion of vitamin D 3 into calcitriol, is also promoted by high plasma parathyroid hormone levels. [4] [5]
Serum 25(OH)D concentration is used as a biomarker for vitamin D deficiency. Units of measurement are either ng/mL or nmol/L, with one ng/mL equal to 2.5 nmol/L. There is not a consensus on defining vitamin D deficiency, insufficiency, sufficiency, or optimal for all aspects of health. [23]
A circulating level of 25-hydroxyvitamin D greater than 30 ng/mL is required to maintain a healthy level of vitamin D, per the NIH—so if you're lower than that, your doc may suggest a supplement.
Recent studies suggest that vitamin D plays an essential role in helping to regulate female sex hormones and that low vitamin D levels can increase the risk for adverse maternal and fetal health ...
The Scientist: Michael T. Murray, N.D., co-author of the "Encyclopedia of Natural Medicine." The Answer: More than half—perhaps up to 70 percent—of Americans are deficient in vitamin D. If you ...
A global representation of vitamin D status in healthy populations (2012) A global representation of vitamin D status in healthy populations: reply to comment by Saadi (2013) File:BlankMap-World6.svg. Own work: Author: The RedBurn
English: Suggested mapping of several bone diseases onto a person's Vitamin D level (as estimated from the serum concentation of calcidiol). Based on Heaney RP (Dec 2004). "Functional indices of vitamin D status and ramifications of vitamin D deficiency Full Text". Am J Clin Nutr 80 (6 Suppl): 1706S–9S. PMID 15585791.
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