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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. [1][7][2] One nanogram per millilitre (1 ng/mL) is equivalent to 2.5 nanomoles per litre (2.5 nmol/L). Severe deficiency: <12 ng/mL = <30 nmol/L[2] Deficiency ...
Although taking vitamin D supplements during pregnancy raises blood levels of vitamin D in the mother at term, [106] the full extent of benefits for the mother or baby is unclear. [105] [106] [107] Pregnant women who take an adequate amount of vitamin D during gestation may experience a lower risk of pre-eclampsia [108] and positive immune ...
Calcitriol is a hormone and the active form of vitamin D, normally made in the kidney. [ 8 ][ 9 ][ 10 ] It is also known as 1,25-dihydroxycholecalciferol. It binds to and activates the vitamin D receptor in the nucleus of the cell, which then increases the expression of many genes. [ 11 ]
v. t. e. Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry ...
Calcifediol is strongly bound in blood by the vitamin D-binding protein. [5] Measurement of serum calcifediol is the usual test performed to determine a person's vitamin D status, to show vitamin D deficiency or sufficiency. [4] [5] Calcifediol is available as an oral medication in some countries to supplement vitamin D status. [4] [6] [7]
A vitamin D blood-concentration standard for diagnosing hypovitaminosis D does not exist. In the past, hypovitaminosis D was defined by blood concentrations lower than 20 ng/mL. [ 6 ] However, in more recent literature many researchers have considered 30 ng/mL to be an insufficient concentration of vitamin D. [ 6 ] Subnormal levels of vitamin D ...