Importance of the method used to estimate 25(OH)D and the definition used for vitamin D status classification in a clinical trial on vitamin D metabolism.

The interesting article by Dandai et al. gave a new perspective on the association between vitamin D deficiency and late-onset neonatal sepsis [[1]]. The most recent Global Consensus on Prevention and Management of Nutritional Rickets in 2016 recommends a different classification system for defining vitamin D status which is evidence-based (Level I evidence, strong recommendation) [[5]]. [Extracted from the article]