为探究血清 25 - 羟维生素 D（25 (OH) D）水平在挪威普通成年人群中的长期变化及影响因素，研究人员开展了 Tr?ndelag 健康研究（HUNT）。结果显示其 11 年间可靠性中等，多种因素与之相关。这表明单次测量评估维生素 D 状态不足，重复测量意义重大。

For every 100 IU of vitamin D, blood 25(OH) D levels increase by 1 ng ml −1, and most experts agree that a minimum of 1000 IU day −1 vitamin D is needed to have a preferred healthy level of ...

Higher vitamin D intake and serum 25(OH)D levels may provide significant benefits for cancer incidence and mortality, according to the results of a meta-meta-analysis published in Nutrients.

Researchers have identified in a new study that increased serum 25-hydroxyvitamin D (25(OH)D) is linked with lower risks of ...

Free 25(OH)D is a stronger predictor of all-cause mortality than total 25(OH)D in older men. Free 1.25(OH)2D, the biologically active metabolite, was not predictive of all-cause mortality.

25-hydroxyvitamin D [25(OH)D] is the precursor of the physiologically active form of vitamin D. The serum level of 25(OH)D is a result of exposure of the skin to sunlight, total vitamin D intake, and ...

The test is also known as the 25-OH vitamin D test and the calcidiol 25-hydroxycholecalcifoerol test. It can be an important indicator of osteoporosis (bone weakness) and rickets (bone malformation).

In a recent study published in Nutrients, a group of researchers examined the association between 25-hydroxy-vitamin D (25(OH)D) concentrations and neurodevelopmental outcomes in 3–5-year-old ...

Higher concentrations of vitamin D, specifically serum 25-hydroxyvitamin D (25(OH)D), are associated with improved survival with chronic obstructive pulmonary disease (COPD), according to a study ...

25(OH)D levels regulate multiple enzymes involved in the production of steroid hormones, such as adrenal steroid hormones, sex hormones, and sex hormone signaling. Vitamin D metabolizes enzymes in ...