Summary: Adverse social determinants of health — including childhood trauma, poverty, discrimination and social isolation — are linked to measurable structural, functional and neurochemical brain changes that associate with schizophrenia-spectrum disorders. Understanding these links offers a critical opportunity for earlier identification of at-risk individuals and targeted interventions to build resilience and prevent progression to severe psychosis.
A comprehensive systematic review of 114 studies involving more than 10,900 participants mapped how environmental stressors act like “extra water” in a vulnerable biological “cup,” increasing the likelihood that underlying vulnerability will overflow into psychosis. Importantly, nearly 30% of people identified as being at clinical high risk for psychosis remit completely without progressing to full-blown illness, highlighting a meaningful window for preventative care.
Key Facts
- Extensive evidence base: The review synthesized 114 original studies across databases, collectively examining early-life adversity, social disconnection, racism/discrimination, poverty and food insecurity in people with or at risk for schizophrenia-spectrum psychotic conditions (SSPCs).
- Cup analogy clarifies risk interaction: Biological vulnerability and social/environmental stressors combine: trauma, deprivation or discrimination add “water” that can cause some people’s innate vulnerability to tip into psychosis sooner than others.
- Observable neurobiological changes: Higher exposure to adverse social determinants correlates with cortical thinning, regional volume loss, reduced structural and functional connectivity, and altered neurochemical markers — all features previously associated with schizophrenia-spectrum disorders.
- Non-deterministic disease course: Schizophrenia risk is not purely genetic or inevitable; roughly 30% of clinical high-risk individuals never transition to psychosis and can fully remit.
- Actionable early-intervention window: Mapping how social stressors become biologically embedded points to opportunities for screening, psychosocial supports, targeted therapies and preventive strategies before severe symptoms develop.
Source: Carnegie Mellon University
Overview
Researchers from Carnegie Mellon University and the University of California, San Francisco conducted a systematic review to clarify how non-medical social factors — often called social determinants of health (SDOH) — influence neurobiology across the schizophrenia spectrum. SDOHs include the conditions in which people are born, grow, live, work and age. Prior research suggests these factors account for a substantial portion of overall health outcomes, but their precise relationship to schizophrenia-related brain changes remained unclear.
The research team, led by Jessica Hua and Kaitlyn Dal Bon, examined 114 peer-reviewed studies published through January 2026. The studies collectively assessed associations between SDOHs (early life adversity, social isolation, racism/discrimination, poverty, food insecurity) and neurobiological measures (brain structure, function, neurochemistry, and plasticity) in more than 10,900 participants across the schizophrenia continuum — from high schizotypy and familial risk to clinical high risk, first-episode psychosis and chronic schizophrenia.
Their review found consistent evidence that greater exposure to adverse social conditions is associated with brain changes known to relate to schizophrenia-spectrum disorders. These include cortical thinning, reductions in regional brain volume, impaired white-matter connectivity, altered task-related functional activation and atypical neurochemical profiles.
Biological embedding of social adversity
The authors explain these effects through the concept of biological embedding: prolonged exposure to traumatic or stressful social conditions triggers chronic physiological stress responses — for example, repeated elevations in stress hormones such as cortisol — that gradually alter brain development and function. Over time, these neurobiological changes can elevate the risk of psychiatric symptoms in those already biologically vulnerable.
Clinical implications
Because a significant portion of people at clinical high risk do not progress to psychosis, identifying which environmental stresses are most neurobiologically harmful creates a practical roadmap for prevention. Screening for childhood trauma, food insecurity, poverty and discrimination, and then offering targeted interventions — such as trauma-informed therapy, social supports, family interventions or medication where appropriate — could strengthen resilience and reduce conversion to chronic illness.
Key Questions Answered
A: Chronic exposure to adversity produces persistent stress responses that affect neurochemistry and brain circuits. Repeated activation of stress systems (for example, sustained cortisol release) can impair white-matter integrity, reduce volume in regions such as the prefrontal cortex and hippocampus, and alter functional patterns — changes that mirror neurobiological signatures linked to schizophrenia-spectrum disorders.
A: This remission rate demonstrates that progression to full psychosis is not inevitable. It underscores that interventions timed during the pre-onset phase can be effective at redirecting the course of illness by reducing environmental stressors, strengthening coping skills, and addressing neurobiological vulnerability.
A: The findings support a shift from reactive treatment after symptom onset to proactive prevention. Health systems should incorporate SDOH screening into early assessment, provide trauma-informed and socially responsive interventions, and coordinate medical, psychological and community supports to reduce structural drivers of mental health disparities.
Editorial Notes
- This article was edited by a Neuroscience News editor.
- The journal article was reviewed in full by staff.
- Additional contextual information was added by the editorial team.
About this schizophrenia research news
Author: Jason Bittel
Source: Carnegie Mellon University
Contact: Jason Bittel – Carnegie Mellon University
Image: Image credited to Neuroscience News
Original Research: Closed access. “Social Determinants of Health and Neurobiology Across the Schizophrenia Course: A Systematic Review” by Jessica P. Y. Hua, PhD, ABPP; Kaitlyn Dal Bon, BA. JAMA Psychiatry. DOI:10.1001/jamapsychiatry.2026.1312
Abstract
Importance: Individuals with schizophrenia-spectrum psychotic conditions are disproportionately exposed to adverse social determinants of health (SDOH). These exposures contribute to earlier onset, more severe symptoms and worse long-term outcomes, but the brain mechanisms linking structural disadvantage to clinical outcomes are not well characterized.
Objective: To examine structural, functional, neurochemical and plasticity-related brain changes associated with SDOHs in individuals with, or at risk for, schizophrenia-spectrum psychotic conditions.
Evidence Review: The review searched PsycInfo, PubMed and Web of Science through January 2026 for empirical studies linking SDOHs (early-life adversity, social disconnection, racism/discrimination, poverty, food insecurity) to neurobiological measures (brain structure, function, neurochemistry, neuroplasticity) across the schizophrenia spectrum. Study quality was assessed using the Joanna Briggs Institute Checklist to weigh contributions to the overall conclusions.
Findings: From approximately 14,500 records identified, 114 studies met inclusion criteria. The majority addressed early-life adversity (n=95), with others examining social disconnection (n=13), racism/discrimination (n=4), poverty (n=2) and food insecurity (n=1). Neurobiological outcomes included structural measures (n=83), functional measures (n=23) and neurochemical measures (n=10); no studies directly measured neuroplasticity. Across 10,921 participants spanning high schizotypy, familial high risk, clinical high risk, first-episode and chronic schizophrenia, stronger exposure to adverse SDOHs was associated with cortical thinning, regional volume loss, decreased structural connectivity, reduced functional activation and abnormal neurochemical levels.
Conclusions and Relevance: The reviewed evidence supports the concept that social adversity becomes biologically embedded and helps explain how SDOHs contribute to clinical outcomes in the schizophrenia spectrum. Integrating neuroscience with social epidemiology can inform prevention, refine treatment approaches and address structural drivers of mental health disparities.