What Causes Seasonal Depression?

4 Dec 2025 · 1 min
0:58

YouTube video by Gary Brecka explaining seasonal affective disorder (SAD): how reduced sunlight during shorter days alters brain chemistry, hormones (including vitamin D3 decline), and social/physiological factors to produce depressive symptoms (oversleeping, carb cravings, low energy). The speaker outlines that SAD is multifactorial (biological, physiological, social) and introduces seven practical mitigation strategies.

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