A Systematic Review of the Association between Poverty and Biomarkers of Toxic Stress

Purpose: Toxic stress has been identified as a key mechanism by which poverty impacts health and empirical evidence on the relationship between poverty and biological markers of toxic stress is accumulating. This study synthesizes the empirical evidence of the relationship between poverty and biomarkers of toxic stress. Method: We conduct a systematic literature review using PRISMA guidelines to assess the relationship between poverty and toxic stress. A total of 56 articles are included in the review assessing 63 poverty and toxic stress relationships. Results: Seventeen of 30 reviewed relationships showed a statistically significant relationship between our measures of poverty and biomarker outcomes. Additionally, 12 of the remaining 13 studies demonstrated partially statistically significant relationship between our poverty measures and biomarker outcomes. Conclusion: Findings demonstrate evidence of the relationship between poverty and toxic stress. Consistently, poverty was related to biological stress and neighborhood poverty was related to physical stress outcomes.