RecruitingNot ApplicableNCT07167004

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

Sponsor

University of Pennsylvania

Enrollment

216 participants

Start Date

Oct 14, 2025

Study Type

INTERVENTIONAL

Conditions

Type 2 Diabetes Mellitus (T2DM)Type 2 Diabetes Type 2 Diabetes (T2DM)Type II Diabetes Type 2 Diabetes Mellitus Type II Diabetes Mellitus Pre-diabetes Pre-diabetic Pre-diabetic State

Summary

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.

Eligibility

Min Age: 45 YearsMax Age: 70 Years

Plain Language Summary

Simplified for easier understanding

This study (the GRAIN Study) is testing whether making it easier to buy whole grains through online grocery shopping nudges and promotions can help people with prediabetes or diabetes eat healthier. Eating more whole grains is associated with better blood sugar control. **You may be eligible if...** - You are between 45 and 70 years old - You are a patient at Penn Medicine and have been diagnosed with prediabetes or diabetes - You currently eat fewer than 5 servings of whole grains per week - You use online grocery shopping at least once a month - You live in Philadelphia or surrounding Pennsylvania counties - You have reliable internet access and speak English **You may NOT be eligible if...** - You do not meet all the above criteria - You do not speak English or cannot provide informed consent Talk to your doctor to see if this trial is right for you.

This summary was AI-generated to explain the trial in plain language. It is not medical advice. Always discuss eligibility with your doctor before enrolling in a clinical trial.

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Interventions

BEHAVIORALMarketing Nudges Only

BEHAVIORALMarketing Nudges + Dynamically Adapted Financial Incentives

Marketing nudges encouraging whole grain purchasing, including displaying whole grains (e.g., whole wheat bread, brown rice) at the top of the study's online grocery store, featuring whole grain banner displays, and offering product swaps to highlight whole grain alternatives, plus personalized financial incentives with individual incentive amounts optimized weekly based on prior whole grain purchasing behavior and engagement