In a new study, we investigated if higher-than-standard vitamin D supplementation has beneficial effects on sleep until 2 years of age and whether early-life 25(OH)D is associated with sleep.
The result showed high-dose vs standard-dose (1200 IU vs 400 IU) daily vitamin D3 provides no benefits for child’s sleep. However, higher early childhood blood vitamin D levels (25-hydroxy-vitamin D concentration) were associated with better sleep, indicating that biomarker associations do not provide direct evidence for causality. Further, higher maternal blood vitamin D levels were associated with better child sleep, which should be studied further.
The study was part of Vitamin D intervention in infants (VIDI) study (Vitamin D intervention in infants (VIDI) study | Metabolic Diseases | University of Helsinki)
See the article:
High-dose vs standard-dose vitamin D and sleep in early childhood: A randomized clinical trial