The GRoceries Aimed at Increasing Nutrition Study

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.

Conditions

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

Interventions

BEHAVIORAL

Marketing Nudges Only

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

BEHAVIORAL

Marketing 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

Sponsors & Collaborators

• National Institute on Aging (NIA)

  collaborator NIH

• American Heart Association

  collaborator OTHER

• University of Pennsylvania

  lead OTHER

Principal Investigators

• Sophia V Hua, PhD, MPH · Department of Medical Ethics and Health Policy, Perelman School of Medicine

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

45 Years

Max Age

70 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2025-10-14

Primary Completion

2027-02-16

Completion

2027-02-16

Countries

• United States

Study Locations