Animal studies and analysis of human data reveal a link between vitamin D deficiency and an increased risk of both opioid addiction and sun-seeking behaviors.
Vitamin D deficiency during pregnancy may explain why males are three times more likely to be diagnosed with ASD than girls. The study reports prenatal vitamin d deficiency increases testosterone in the developing male brain.
Higher levels of vitamin D during pregnancy were linked to increased IQ in children.
Vitamin D3 supplements do not help to lift mood in those who suffer from depression. Researchers say there is no significant benefit for vitamin D supplements to help prevent depression or to improve mood.
COVID-19 patients from countries with higher mortality rates for the infection had lower levels of vitamin D compared to those from countries with lower mortality rates. Findings suggest a link between vitamin D deficiency and an increased risk of both more severe coronavirus infection and mortality as a result of contracting the virus.
Middle-school aged children with vitamin D deficiency were twice as likely to develop externalizing behavior problems and mood disorders during adolescence than their peers with higher levels of the vitamin.
Optimal levels of Vitamin D are different, depending on a person's ethnic background. People with less than 20 nanograms of vitamin D per milliliter of blood are deficient. However, taking higher doses of vitamin D through supplements may not be beneficial, as previous studies have shown high dose supplements can increase bone fracture risks.
Vitamin D supplementation may help reduce some of the non-motor symptoms associated with Parkinson's disease.
Lower exposure to UVB rays during pregnancy has been linked to an increased risk of learning disabilities in children. According to the study, lower UVB exposure during the first trimester had a slightly stronger correlation with neurodevelopmental disorders.