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Vitamin D toxicity, or hypervitaminosis D, is the toxic state of an excess of vitamin D. The normal range for blood concentration of 25-hydroxyvitamin D in adults is 20 to 50 nanograms per milliliter (ng/mL).
Lower limit Upper limit Lower limit Upper limit Vitamin A: 30 [23] 65 [23] μg/dL Vitamin B 9 (Folic acid/Folate) – Serum: Age > 1 year: 3.0 [126] 16 [126] 5 [127] ng/mL or μg/L 6.8 [128] 36 [128] 11 [128] nmol/L Vitamin B 9 (Folic acid/Folate) – Red blood cells: 200 [126] 600 [126] ng/mL or μg/L 450 [128] 1400 [128] nmol/L Pregnant: 400 ...
The Office of Dietary Supplements recommends daily vitamin D intakes of 600 IU (15 mcg) ... established daily upper limits (ULs) of what is safe to consume. People 9 and older, for example, may ...
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 ...
The standard definition of a reference range for a particular measurement is defined as the interval between which 95% of values of a reference population fall into, in such a way that 2.5% of the time a value will be less than the lower limit of this interval, and 2.5% of the time it will be larger than the upper limit of this interval, whatever the distribution of these values.
Taking too much vitamin D can be toxic in rare cases, as with an 89-year-old U.K. man who died last year in part from vitamin D toxicity (though he did have several underlying conditions).
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