Here’s a list of studies about vitamin D and depression:

Serum 25-Hydroxyvitamin D Concentrations and Depressive Symptoms Among Young Adult Men and Women (2014)

Conclusion: A study of 615 young adults found that those with lower vitamin D levels had worse depression scores.


Suicidal Patients are Deficient in Vitamin D, Associated with a Pro-Inflammatory Status in the Blood (2014)

Conclusion: 59 suicide attempters were enrolled in a study and tested for their vitamin D status along with non-suicidal depressed people and non-depressed healthy control subjects. 58% of the suicide attempters were clinically deficient in vitamin D and had lower levels than than the non-suicidal depressed subjects and non-depressed, healthy control subjects.


Depression is Associated with Decreased 25-Hydroxyvitamin D and Increased Parathyroid Hormone Levels in Older Adults (2008)

Conclusion: A study of 1,282 Dutch elderly people found that those who reported having minor and major depression had lower vitamin D levels compared to the rest of the participants.


Vitamin D Deficiency is Associated with Low Mood and Worse Cognitive Performance in Older Adults (2006)

Conclusion: A study of 80 older adults found that 58% had inadequate vitamin D levels and those with lower levels had worse scores on depression and cognitive function tests.


Neuropsychological Function in Relation to Serum Parathyroid Hormone and Serum 25-Hydroxyvitamin D Levels. The Tromsø Study. (2006)

Conclusion: This study of 21 patients suffering from secondary hyperparathyroidism found that they had lower vitamin D levels compared to 63 control subjects. Those with lower vitamin D levels also had a higher depression score.


Effect of Sunlight and Season on Serotonin Turnover in the Brain (2002)

Conclusion: A study of 101 healthy men found that their serotonin levels were lowest during winter, when there’s less sunlight, but “rose rapidly” as the amount of bright sunlight increased.


Light Treatment for Nonseasonal Depression: Speed, Efficacy, and Combined Treatment (1998)

Conclusion: Bright light treatment was found to alleviate depression faster than medication. (You know… like SUNLIGHT)


Morning vs Evening Light Treatment of Patients with Winter Depression (1998)

Conclusion: Morning bright light therapy is more effective as an antidepressant compared to evening bright light therapy. (Yep, the sun rises in the morning.)


Bone Mineral Density in Women with Depression (1996)

Conclusion: Compared to normal women, depressed women tend to have lower bone mineral density. Both depression and lower bone mineral density are symptoms of vitamin D deficiency.



Back to Research Directory

Back to Blog

Leave a Reply