Dr. Soma Mandal, a board-certified internist at Summit Health in New Providence, New Jersey, says that getting a CBC test is ...

Recent studies indicate that low levels of vitamin D are linked to a higher risk of Alzheimer’s disease and other forms of dementia. But does that mean taking more vitamin D will prevent it? Here’s ...

Experts haven’t agreed on a number that defines a low vitamin D level. For most healthy people, the Office of Dietary Supplements states that a vitamin D serum (blood) level below 20 nanograms ...

Vitamin D, a fat soluble vitamin, is important for several body functions, including heart activity. The human body needs 25-hydroxy vitamin D between 20 and 40 ng/mL to function properly and ...

Average Vitamin D Levels by Age Group The 25-hydroxy vitamin D blood test can determine vitamin D levels. The results may be reported in nanograms per milliliter (ng/mL) or nanomoles per liter (nmol/L ...

Variable assay performance is caused by differences in assay design and can be assessed by challenging the assays with samples containing common interferences, such as heterophile antibodies, ...

Serum 25-hydroxy vitamin D level is associated with elastography-detected liver fibrosis in patients with type 2 diabetes mellitus in China Nan Huang 1,2† Xianghui Su 3† Ting Yu 4† Xiaodong Wu 1,2 ...

They also had a serum 25-hydroxy vitamin D level between 10 and 30 ng/mL, which indicates either “insufficient” vitamin D levels (below 30/mL) or vitamin D deficiency (below 20 ng/mL).

Background Although vitamin D insufficiency is prevalent in the community, only a few population-based studies have measured serum 25-hydroxy-vitamin D (25OHD) levels during pregnancy and in newborns.

The most accurate measurement of your vitamin D levels is a 25-hydroxy vitamin D test. It measures your blood level of 25-OH vitamin D, or the form of D that is converted and used by your body.

Low vitamin D levels were defined as 25-hydroxy vitamin D levels < 30 ng/mL, with 20 to < 30 ng/mL considered insufficient and < 20 ng/mL considered deficient.