Vitamin D plays a critical role in our body by activating the gene responsible for produci

Well SupportedUp to 70% of people in the US are deficient or insufficient in vitamin D, suggesting widespread supplementation is advisable.

Well SupportedTarget vitamin D levels for adequate health are often debated between 30-40 ng/mL, with higher levels like 50-60 ng/mL considered optimal.

Well SupportedThe enzymes TPH1 and TPH2 for serotonin production contain the VDRE sequence, suggesting a mechanism for vitamin D's effect on brain function.

Partially SupportedVitamin D may repress tryptophan hydroxylase-1 (TPH1) in the gut, potentially affecting gut serotonin production.

Partially Supported