High Vitamin D supplementation reduces internalizing issues of childhood
A new study published in the Journal of American Medical Association suggests that higher-than-average vitamin D3 intake in the first two years reduced the incidence of internalizing issues between the ages of 6 and 8 years.
Although vitamin D has been linked to neurodevelopment, the exact cause, crucial times, and potential for change are yet unclear. Therefore, Samuel Sandboge and team conducted this study to see whether children with lower vs higher maternal vitamin D3 levels would experience different effects on their psychiatric symptoms at ages 6 to 8 years. Lower vs higher levels were defined as 25-hydroxyvitamin D (25[OH]D) less than 30 ng/mL vs 30 ng/mL or greater, respectively.
This study was a long-term follow-up of the Vitamin D Intervention in Infants (VIDI) double-blind randomized clinical trial (RCT), which was carried out at a single centre in Helsinki, Finland, at 60 degrees north latitude. The VIDI recruitment period ran from 2013 to 2014. From 2020 to 2021, follow-up data were gathered for the study of secondary data. In the beginning, VIDI comprised 987 term-born infants. Of these, 546 took part in the follow-up at ages 6 to 8 years, and 346 of them provided information on parent-reported mental symptoms. Data was examined between June 2022 and March 2023. From the age of two weeks to the age of 24 months, 169 babies were randomly assigned to receive 400 IU of vitamin D3 and 177 infants were randomly assigned to receive 1200 IU of vitamin D3 daily.
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