25-hydroxy-vitamin D


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25-hydroxy-vitamin D

This is the form of vitamin D that is measured in order to assess vitamin D deficiency.
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Vitamin D is measured in the blood as 25-hydroxy-vitamin D, abbreviated 25(OH)D.
For example, compared to people in the deficient range, those with higher blood levels of 25-hydroxy-vitamin D had significantly lower risk of heart failure, depression, coronary artery disease, and kidney failure.
Sonia Servaja of Hospital del Mar in Barcelona, and colleagues, assessed the association between 25-hydroxy-vitamin D (25[OH]D) concentrations and bone loss at baseline, after 3 months of supplementation, and after 1 year, in patients receiving aromatase inhibitor therapy for early-stage breast cancer.
Researchers had hypothesized that malnutrition could contribute to vitamin D deficiency and therefore expected mean serum 25-hydroxy-vitamin D [25(OH)D] levels to be significantly lower in malnourished oncology patients.
The only accurate blood test is called 25-hydroxy-vitamin D, or 25(OH)D for short.
Both the presence and severity of depression are associated with decreased serum levels of 25-hydroxy-vitamin D and increased levels of parathyroid hormone in older patients, Dutch researchers reported.
The panel concluded that the best way to evaluate a person's vitamin D status would be to measure concentrations of an inactive form known as 25-hydroxy-vitamin D (25-D) that circulates in the blood.
OBJECTIVE: Serum 25-hydroxy-vitamin D [25(OH)D] levels are inversely associated with important cardiovascular disease (CVD) risk factors.
Participants with more than 75 nmol/L of circulating 25-hydroxy-vitamin D (25-[OH]D) had a 40% lower risk of developing colorectal cancer over a mean 3.
Vitamin D deficiency exists when the concentration of 25-hydroxy-vitamin D (25-OH-D) in the blood serum occurs at 12ng/ml (nanograms/millilitre) or less.
Many nutrition experts say a 25-hydroxy-vitamin D level of 30-35 ng/mL is a reasonable target; others argue that is two- or threefold too low.
Assessing serum 25-hydroxy-vitamin D (25(OH)D) is the only way to make the diagnosis and to assure treatment is adequate and safe.