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A normal ferritin blood level, referred to as the reference interval is determined by many testing laboratories. The ranges for ferritin can vary between laboratories but typical ranges would be between 40 and 300 ng/mL (=μg/L) for males, and 20–200 ng/mL (=μg/L) for females. [30]
Acid–base and blood gases are among the few blood constituents that exhibit substantial difference between arterial and venous values. [6] Still, pH, bicarbonate and base excess show a high level of inter-method reliability between arterial and venous tests, so arterial and venous values are roughly equivalent for these.
[4]: 427 The normal range for blood concentration of 25-hydroxyvitamin D in adults is 20 to 50 nanograms per milliliter (ng/mL; equivalant to 50 to 125 nmol/L). Blood levels necessary to cause adverse effects in adults are thought to be greater than about 150 ng/mL. [4]: 424–446
A 2011 Institute of Medicine (IOM) report set the sufficiency level at 20 ng/mL (50 nmol/L), while in the same year The Endocrine Society defined sufficient serum levels at 30 ng/mL and others have set the level as high as 60 ng/mL. [89] As of 2011 most reference labs used the 30 ng/mL standard. [63] [89] [90]: 435
Vitamin D2 vs. D3 Uses. Both vitamin D2 and vitamin D3 will help to increase vitamin D levels in the blood, says Pelitera. However, some studies have shown that supplementing vitamin D3 does a ...
The normal range for blood concentration of 25-hydroxyvitamin D in adults is 20 to 50 nanograms per milliliter (ng/mL). Blood levels necessary to cause adverse effects in adults are thought to be greater than about 150 ng/mL, leading the Endocrine Society to suggest an upper limit for safety of 100 ng/mL. [1]
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.
In adults, normal total body folate is between 10 and 30 mg with about half of this amount stored in the liver and the remainder in blood and body tissues. [1] In plasma, the natural folate range is 150 to 450 nM. [15] Folate was discovered between 1931 and 1943. [16] It is on the World Health Organization's List of Essential Medicines. [17]