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Related Experiment Video

Updated: Jan 7, 2026

Dried Blood Spot Collection of Health Biomarkers to Maximize Participation in Population Studies
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Biomarkers.

Alaa Harb1, Juliana Nery Souza-Talarico2, Peter Abad3

  • 1University of Iowa, Iowa City, IA, USA.

Alzheimer'S & Dementia : the Journal of the Alzheimer'S Association
|December 25, 2025
PubMed
Summary
This summary is machine-generated.

Discrimination significantly impacts the health of Black adults aged 40+, increasing physiological stress (allostatic load). Current discrimination experiences show a stronger link to allostatic load than past ones.

Keywords:
Allostatic LoadBlack People Middle Aged.Perceived Discrimination

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Area of Science:

  • Public Health
  • Social Epidemiology
  • Gerontology

Background:

  • Discrimination is a key social determinant of health.
  • Black middle-aged and older adults experience disproportionate health burdens.
  • This study focuses on discrimination's impact on physiological stress.

Purpose of the Study:

  • To systematically review and meta-analyze the relationship between discrimination and allostatic load (AL).
  • To examine this relationship specifically in Black adults aged 40 and older.

Main Methods:

  • Systematic literature search following PRISMA guidelines.
  • Inclusion of studies measuring discrimination and AL in Black adults (40+).
  • Quality assessment using ROBINS-E tool and random-effects meta-analysis.

Main Results:

  • Six studies (N=5,006) were included.
  • A small-to-moderate association found between discrimination and AL (Hedges's g=0.321, p=0.025).
  • Current discrimination had stronger associations with AL than past discrimination; significant heterogeneity noted.

Conclusions:

  • Evidence supports a link between discrimination and AL in Black middle-aged and older adults.
  • The timing and type of discrimination exposure may influence physiological stress.
  • Longitudinal research is recommended to understand temporal dynamics and inform interventions.