Vitamin D assay and supplementation: still debatable issues.
Study Goal
The researchers aimed to clarify the measurement of vitamin D, evaluate the scientific evidence on supplementation efficacy/safety, and discuss recommended deficiency/toxicity levels in light of standardization projects.
Results Summary
The abstract highlights advancements in vitamin D measurement and standardization but does not present specific efficacy results. It emphasizes the need for further discussion on deficiency, insufficiency, and toxicity levels, as well as the interrelations between vitamin D, PTH, and FGF23.
Population
Not specified
Effective Dosage
Not available
Duration
Not specified
Interactions
None mentioned
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
vitamin D supplementation | decrease | vitamin D deficiency | deficient individuals | - | need for | #1 |
Over the last decades, in addition to the improvement of pathophysiological knowledge regarding the role and mechanisms of action of vitamin D, there has been a progressive advancement in analytical technologies for its measurement, as well as in methodological standardization. A significant number of scientific works, meta-analyses, and guidelines have been published on the importance of vitamin D and the need for supplementation in deficient individuals. However, it appears necessary to clarify the fundamental elements related to the measurement of vitamin D (both at the strictly analytical and post-analytical levels) and the scientific evidence related to the efficacy/safety of supplementation. In particular, there is a need to discuss current recommended levels for deficiency, insufficiency and possible toxicity in the light of evidence from standardization projects. Additionally, given the important interrelations between vitamin D, parathyroid hormone (PTH), and fibroblast growth factor-23 (FGF23), the analytical issues and clinical utility of these biomarkers will be discussed.