Nutritional biomarkers and three-month symptom changes in antidepressant-free adolescents with major depressive disorder: a retrospective cohort study.
Adolescents with MDD showed lower vitamin D and folate than controls, but nutritional biomarkers did not independently predict symptom severity, and the three-month symptom improvement-occurring without antidepressants-was not explained by biomarker changes and likely reflects multiple factors including regression to t...