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Research does seem to show a link between low levels of vitamin D in the blood and symptoms of depression. However, research hasnât yet shown clearly whether low vitamin D levels cause depression, or whether low vitamin D levels develop because someone is depressed.here are a number of good research studies from the last few years that look specifically at vitamin D and depression. In a review of research about vitamin D and depression in 2013, 9 researchers looked for and analysed all of the published research about depression and vitamin D up until February 2011.
The Academy of Nutrition and Dietetics reports there is a possible connection between vitamin D and the levels of the mood-boosting neurotransmitter serotonin in the brain, but ties between vitamin D and mood are still largely unknown, according to research by the National Institutes of Health.