![]() ![]() In the first weeks of life, calcium absorption occurs mainly via paracellular mechanisms that are not dependent on vitamin D. This knowledge has prompted current guidelines to recommend that vitamin D supplementation for infants is initiated as soon as possible. Not surprisingly, neonatal vitamin D status reflects maternal status. Therefore, recommendations for vitamin D intake are made assuming minimal or nonexistent cutaneous production of vitamin D. ![]() Although cutaneous production of vitamin D occurs in infants, the use of sunblock and other factors limiting sun exposure make this an unreliable source. Most guidelines recommend 400 IU daily of vitamin D to support bone health in preterm and full-term infants. Inadequate vitamin D in infants leads to poor bone mineralization and increased risk of rickets. Vitamin D is essential for transcellular absorption of calcium and for skeletal health. Focus Vitamin D is a critical nutrient for bone health and needs to be provided to all infants whether via infant formula or as a supplement to breastfed infants or high-dose supplement to their mothers Vitamin D in Preterm and Full-Term Infants Key Insight ![]()
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