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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.
While some studies have found that vitamin D 3 raises 25(OH)D blood levels faster and remains active in the body longer, [44] [45] others contend that vitamin D 2 sources are equally bioavailable and effective for raising and sustaining 25(OH)D. [46] [47] If digestive disorders compromise absorption, then intramuscular injection of up to ...
Low vitamin D levels can cause muscle weakness, cramps and bone pain. You'll generally feel muscle weakness in your upper arms, hips and thighs, according to Yale Medicine, which can cause you to ...
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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.
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
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The historic importance of vitamin C deficiency relates to occurrence on long sea-going voyages, when the ship food supplies had no good source of the vitamin. Deficiency results in scurvy when plasma concentrations fall below 0.2 mg/dL, whereas the normal plasma concentration range is 0.4 to 1.5 mg/dL.