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Yes a relationship between vitamin D deficiency and the presence of a current mood disorder, as assessed by the depressive symptoms inventory, was found. ... In this study, women with lower vitamin D levels consistently showed higher rates of depression as compared to women withhigher vitamin D levels.

It is well-known that several studies have suggested that the symptoms of SAD may be due to changing levels of vitamin D3, which may affect serotonin levels in the brain. Although vitamin D supplementation may improve mood, vitamin D is only a small, but critical, part of treatment as depression has myriad causes.

Incidents of Seasonal Affective Disorder (SAD) more prevalent in the northern latitudes can be treated with phototherapy, i.e., exposing the patient to the correct wavelengths of light similar to the solar spectrum. Knowing that skin exposure to sunlight results in Vitamin D production, there is no doubt that a correlation exists between low Vitamin D levels and depression incidents.

@ Dr. Fatima Faiq

Yes, low level of vitamin D in the body is linked to depression. Kindly see the following RG links for details.

Article Vitamin D and Depression: Cellular and Regulatory Mechanisms

Article Vitamin D and Depression: Where is all the Sunshine?

Article Depression and Vitamin D Deficiency: Causality, Assessment, ...

Article Depression and Vitamin D Deficiency/Insufficiency among Saud...

Article Vitamin D for Depression with a Seasonal Pattern: an Effecti...

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Yes direct correlation between.

maybe.

A great discussion by fellow researchers and academics and important and interesting information, thank you "very much" to all of you "with appreciation and respect

Low levels of sunlight such as in the northern latitudes are known to cause Seasonal Affective Disorder (SAD). Thus, the less the amount of sunshine exposure less there will be of Vitamin D. Hence the correlation between dpression adn Vitamin D levels.

Elevation of intrcellular calcium in neurons promotes depression. Since vitamin D is essential to keep intra neuronal calcium in low levels, development of depression would be enhanced in vitamid D deficiency. Please refer to (Pharmacol Rev. 2017 Apr;69(2):80-92).