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Twin Study Finds No Broad Cytokine Link to Depression or Alcohol Use Disorder

Photoreal illustration of cytokine molecules and brain imagery, conveying inflammation-depression hypothesis under scrutiny.

The broad cytokine story failed its most direct community test: in 972 adults, depression, alcohol use, and alcohol use disorder (AUD) were not associated with C-reactive protein (CRP) or a pre-registered pro-inflammatory cytokine index. The only multiple-testing-corrected cytokine hits ran opposite the hypothesis — AUD was linked to lower IL-1β, IL-4, IL-10, and IL-12 — …

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