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The GRoceries Aimed at Increasing Nutrition Study
Prompting a Switch From Refined Grains to Whole Grains in an Online Grocery Store Using Marketing Nudges and Financial Incentives
Who can join
Ages 45 to 70 · All sexes
Full eligibility criteria
Inclusion Criteria: * Age 45 - 70 years. * Able to provide consent. * Resident of Philadelphia, Bucks, Delaware, Chester, or Montgomery Counties in Pennsylvania. * Consume \<5 servings of whole grains per day. * Use online grocery shopping at least once per month. * Have access to a credit or debit card to pay for groceries purchased. * Have reliable internet access. * Speak English. * Penn Medicine patient diagnosed with prediabetes or diabetes (identified using ICD-10 codes R73.03, E11). Exclusion Criteria: * Does not meet all the inclusion criteria. * Not able to speak English. * Not able to provide consent.
About the study
Only 2% of Americans meet the recommended levels of whole grain consumption, despite its association with reduced risk of type 2 diabetes. This study aims to assess if consumers with prediabetes or type 2 diabetes can be encouraged to switch from buying refined grain products to whole grain products when shopping for groceries online. The study will use personalized marketing strategies, with or without discounts which adjust based on purchasing behavior, to promote whole grain consumption.
What is being tested
- Marketing Nudges Only (behavioral)
- Marketing Nudges + Dynamically Adapted Financial Incentives (behavioral)
Sponsor: University of Pennsylvania · Participants: 216 · Started: Oct 14, 2025
Contact the study team
- Emily Dzieniszewski, MPH · Phone: 215-898-0954
Official record on ClinicalTrials.gov — NCT07167004
Locations in the U.S.
| Pennsylvania | University of Pennsylvania, Philadelphia |
Conditions
From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.