Bidirectional changes in serum 25-hydroxyvitamin D in newborns during the first four days of life: A longitudinal cohort study | Synapse
April 16, 2026Open Access
Bidirectional changes in serum 25-hydroxyvitamin D in newborns during the first four days of life: A longitudinal cohort study
Key Points
This research aims to quantitatively describe the changes in serum 25-hydroxyvitamin D levels in newborns during the early days of life.
Longitudinal cohort study
Measurement of serum 25-hydroxyvitamin D levels over four days post-birth
Assessment of physiological changes in vitamin D
Quantitative data on serum 25-hydroxyvitamin D levels in newborns over the first four days.
Findings indicate significant fluctuations in vitamin D levels shortly after birth.
Abstract
This study provides the first quantitative description of short-term changes in neonatal 25(OH)D after birth and suggest dynamic physiological regulation of vitamin D during early life.