Food Deserts, Corner Stores, and Cardiometabolic Risk
Neighborhood retail environments are a fundamental determinant of diet and cardiometabolic health. This mixed‑methods study examines how limited access to full‑service grocery stores, the prevalence of corner stores and fast‑food outlets, pricing disparities, and targeted marketing interact with household time scarcity and economic constraints to shape dietary intake and cardiometabolic risk in three majority‑Black neighborhoods. Combining household surveys, store inventories and price audits, biomarker collection for a subsample, and focus groups with residents and retailers, we document pathways linking constrained retail options to higher consumption of ultra‑processed foods and elevated obesity, hypertension, and glycemic markers. Pilot interventions—healthy stocking subsidies for corner stores and a community‑owned cooperative grocery—are evaluated for feasibility and early impact, showing improvements in availability and modest shifts in purchasing when coupled with affordability supports. The findings point to the need for structural retail, zoning, and subsidy policies to create sustained improvements in food environments and health equity.
Introduction
Food access is shaped by retail geography, pricing, and marketing. Low‑income neighborhoods often face limited availability of fresh produce and higher prices for healthy items, which, combined with time scarcity and targeted marketing, contribute to diet‑related disease. This study examines these structural pathways and tests retail interventions to improve availability and affordability.
Methods
We conducted household surveys (n=1,200), store inventories and price audits (240 outlets), and focus groups. Biomarkers (BMI, BP, HbA1c) were collected for a subsample (n=420). Two pilot interventions were implemented: a healthy stocking subsidy for corner stores and a community‑owned cooperative grocery. Mixed‑effects models linked retail characteristics to dietary intake and biomarkers; qualitative analysis interpreted barriers and facilitators.
Results
Residents in underserved areas consumed more ultra‑processed foods and had higher obesity and hypertension prevalence. Fresh produce was 22–35% more expensive in corner stores. The healthy stocking subsidy increased produce availability by 48% in participating stores and modestly increased purchases; the cooperative grocery improved affordability but required sustained capital and management capacity.
Discussion
Structural retail interventions—subsidies, zoning incentives, and support for community ownership—are necessary to shift food environments. Short‑term subsidies can improve availability, but long‑term sustainability requires integrated financing, community governance, and policies addressing pricing and marketing practices.
References
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