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Short-term exposure to increased sunshine duration reduces mental disorder risks in cooler conditions, suggesting a protective effect of sunlight.
Shot-term exposure to increasing SSD was associated with decreases in episode risks of depressive disorder and schizophrenia, and such associations were more apparent at low temperatures. Increasing the duration of sunlight exposure and reducing exposure to increasing temperature, especially in the cool season, may help reduce the burdens of depressive disorder and schizophrenia.
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Bai et al. (2026) studied this question.
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