Most depression doesn’t start in the brain.

14 Jul 2025

This is a YouTube video titled "Most depression doesn’t start in the brain." containing a German-language dialogue between two speakers discussing the biochemical origins of serotonin and its role in mood and depression. The conversation explores how serotonin is produced from tryptophan, its transport via the vagus nerve to the brain, and the implications for mental health when serotonin production is impaired. The content was created in July 2025.

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