• Emily W Duffy, Shu Wen Ng, Maxime Bercholz, Cassandra R Davis, Molly De Marco, Marissa G Hall, Joanna Maselko, and Lindsey Smith Taillie.
• Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; Carolina Population Center, Chapel Hill, North Carolina. Electronic address: eduffy@centerfornutrition.org.
• Am J Prev Med. 2024 Jul 19.

IntroductionThe Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) provides nutritious foods to more than six million low-income families. In June 2021, WIC increased the amount of money provided for fruits and vegetables (FV), but studies have not investigated whether this increase changed WIC participant FV purchases. The objective was to estimate the association between the FV funding increase and WIC shopper FV purchases.MethodsThis evaluation uses longitudinal food transaction data from 496 stores in a grocery store chain in North Carolina between June 2020 and April 2022 and a propensity score weighted difference-in-differences (DID) approach to estimate the association between the FV funding increase and FV and other food group purchases. Analyses were conducted in 2023 and 2024.ResultsWIC shoppers' WIC-eligible FV purchases increased by $12.4 per shopper per month (adjusted confidence interval [ACI], $12.0-$12.9) after the FV benefit increase, which was $9.3 (ACI, $8.7-$10.0) more than non-WIC shoppers. The monthly volume and unique varieties of FV purchased also increased more among WIC shoppers relative to non-WIC shoppers (DID 67.1 ounces [ACI, 61.9-72.3] and DID 2.1 varieties [ACI, 2.0-2.3]). There were also increases in the volume of processed foods (DID 22.0 ounces [ACI, 17.2, 26.9]) and sugar-sweetened beverages (DID 49.1 ounces [ACI, 33.4, 64.9]) purchased among WIC shoppers relative to non-WIC shoppers.ConclusionsIncreased WIC FV funding was associated with greater FV purchases. Research is needed to understand the effects of this policy on total dietary intake.Copyright © 2024 Elsevier Inc. All rights reserved.

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