Dollar store groceries linked to worse metabolic health

Dollar store groceries and metabolic health: what happened

New research from the University of California, Riverside reports a link between dollar store food quality and worse metabolic health outcomes across U.S. cities.

The study, published in BMC Public Health, associates dollar store access with higher rates of obesity, high blood pressure, cholesterol and type 2 diabetes, while linking traditional grocery store access to better health metrics.

• Study author: Ryan Bruellman, UCR doctoral student (genetics, genomics and bioinformatics)
• Publication: “Beyond proximity: how food quality in dollar and grocery stores influences health,” BMC Public Health (2026)
• Dollar stores included: Dollar General, Dollar Tree, the 99 Cent Store, and Family Dollar

What the evidence shows about dollar store groceries and metabolic health

This was a geographic and population-level analysis that combined health metrics from the CDC’s 500 Cities Project with mapped access to stores near residential areas.

The researchers mapped how many dollar stores and traditional grocery stores were within a 10-minute drive of residential areas, and found the results held across the U.S. even after accounting for factors including income and unemployment levels.

• Data source: CDC 500 Cities Project (largest continental U.S. metropolitan areas and cities)
• Mapping tool: ArcGIS, used to analyze store distribution near residential areas
• Store footprint: the dollar store brands listed represent about 34,000 locations in total, per the report

Why dollar store groceries may matter for metabolic health

The report frames the issue as food quality rather than price, linking lower-quality, highly processed food options at dollar stores with adverse metabolic health outcomes.

The authors also note a measurement blind spot: the U.S. Census designates dollar stores as general merchandise outlets rather than grocery stores, which means they may be missed in research focused only on traditional grocers.

• Quote from the first author: higher grocery costs can push people toward “highly processed, lower-quality food at dollar stores,” with negative health impacts similar to fast food
• Key point emphasized: “It is the quality of the food, not its price,” that is tied to the reported health problems
• Classification issue: dollar stores often fall outside “grocery store” definitions in studies

Practical context for managing metabolic health on a dollar store budget

The study’s implications center on access and quality: when dollar stores are a main nearby food source, improving what’s stocked may matter more than reducing the number of stores.

The researchers suggest policy and community options that could bring more fresh produce closer to where people already shop, including partnerships and siting decisions.

• Potential approach: dollar stores partnering with local farmers to increase fresh fruits and vegetables
• Another option: cities encouraging more local farmers markets and food banks
• Siting idea: place farmers markets closer to dollar stores to “meet people where they are”

Limitations and caveats to keep in mind

This research reports associations between store access and city-level health metrics; it does not prove that shopping at dollar stores causes any individual’s obesity, high blood pressure, cholesterol or type 2 diabetes.

The effects were not uniform across regions and cities, and the author notes that in some places—such as Philadelphia—the data did not capture the influence of bodegas or smaller independent grocery stores, which could reduce the apparent impact of dollar store shopping.

• Geographic variation: effects differed across regions; in the South and Midwest, the ratio of dollar stores to traditional grocery stores was roughly 50/50
• Potential missing context: local food retailers like bodegas may not be fully represented in the analysis
• Access measure used: stores within a 10-minute drive of residential areas, paired with a social vulnerability index