The inextricable link: Landmark German study confirms smoking fuels depression risk   A major German study provides strong, population-level evidence that smoking significantly increases the lifetime risk of clinical depression. The research found a clear link, with depression being more common in both current and former smokers than in those who never smoked. The relationship is “dose-dependent,” meaning more cigarettes smoked per day correlates with more severe depressive symptoms. The analysis showed that for each additional cigarette smoked daily, the severity of current depressive symptoms increased, with a pack-a-day habit linked to a clinically meaningful rise in depression scores. The…

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