Zhang X, Luo K, He X, et al. - Researchers undertook this prospective cohort study to determine if serum 25‐hydroxyvitamin D (25(OH)D) concentrations at birth are related to lung disease morbidities in very preterm infants. Participants were 93 infants born before 32 weeks of gestation and these were assigned to three groups based on their 25(OH)D concentrations at birth. A low serum 25(OH)D concentration (<50 nmol/L) was identified as a risk factor for respiratory distress syndrome (RDS), as shown in logistic analysis adjusted for gestational age and birth weight. Overall, findings revealed low 25(OH)D levels (<50 nmol/L) were highly prevalent and a link was evident between vitamin D status and RDS among very preterm infants.