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Winter depression: can vitamin d shed light on mood?
5 janvier 2026
By Ana Espino | Published on January 5, 2026 | 3 min readSeasonal affective disorder (SAD) is a recurrent form of major depressive disorder or bipolar disorder, characterized by depressive episodes occurring at specific times of the year, predominantly in winter. Despite the partial effectiveness of light therapy, antidepressants, or cognitive therapy, a substantial proportion of patients remain i
By Ana Espino | Published on January 5, 2026 | 3 min read
Seasonal affective disorder (SAD) is a recurrent form of major depressive disorder or bipolar disorder, characterized by depressive episodes occurring at specific times of the year, predominantly in winter. Despite the partial effectiveness of light therapy, antidepressants, or cognitive therapy, a substantial proportion of patients remain insufficiently relieved. This therapeutic resistance is partly explained by an incomplete understanding of the underlying neurobiological mechanisms.
Seasonal affective disorder (SAD) is a recurrent form of major depressive disorder or bipolar disorder, characterized by depressive episodes occurring at specific times of the year, predominantly in winter. Despite the partial effectiveness of light therapy, antidepressants, or cognitive therapy, a substantial proportion of patients remain insufficiently relieved. This therapeutic resistance is partly explained by an incomplete understanding of the underlying neurobiological mechanisms.
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Scientific reference
Petric, D. (2021). The importance of vitamin D in seasonal affective disorder and other depressive disorders. International Journal of Medical Reviews and Case Reports, 5(13), 1-48
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